Mohammad Al-Masum - Academia.edu (original) (raw)
Papers by Mohammad Al-Masum
International Journal of Organic Chemistry, 2022
ChemInform, Dec 22, 2009
ABSTRACT An unprecedented cross-coupling reaction of potassium allyltrifluoroborates and aryl hal... more ABSTRACT An unprecedented cross-coupling reaction of potassium allyltrifluoroborates and aryl halides to the corresponding trans-β-methylstyrenes in the presence of PdCl2(dtbpf) catalyst under microwave heating was developed.
Tetrahedron Letters, Aug 1, 2008
ChemInform, Jun 22, 2010
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
International Journal of Organic Chemistry, 2012
After purging air through the mixture of aldehydes and amino alcohols and microwaved the reaction... more After purging air through the mixture of aldehydes and amino alcohols and microwaved the reaction mixture at 50˚C for minutes gave the corresponding oxazinanes, and oxazolidines in excellent yields.
Journal of Organic Chemistry, Jun 24, 2000
International Journal of Organic Chemistry, 2018
A microwave irradiated palladium-catalyzed reaction of carboxylic acids and crotyl type bromides ... more A microwave irradiated palladium-catalyzed reaction of carboxylic acids and crotyl type bromides creates series of esters in good to high yields. This facile ester synthesis then is applied to make esters from arachidonic acid, salicylic acid, folic acid, and aspirin efficiently.
Tetrahedron Letters, Aug 1, 2019
Esters are chemical compounds with many practical uses. The common type of esterification is call... more Esters are chemical compounds with many practical uses. The common type of esterification is called the Fischer esterification. Another one is by the action of acid chlorides on alcohols but not with tertiary alcohols. The stable carbenium ions formed from tertiary alcohols favor elimination and the byproduct, hydrogen chloride prevents ester formation. In this new report, palladium inserted ArCOPdCl species reacts with tertiary alcohols and cross-coupling under microwave heating, minimizes the formation of probable carbenium ion, and promotes successful production of highly substituted esters in good to high yields.
Tetrahedron Letters, Feb 1, 2006
Polyphenylalkene derivatives Q 0740 Microwave-Enhanced Cross-Coupling Reactions Involving Alkenyl... more Polyphenylalkene derivatives Q 0740 Microwave-Enhanced Cross-Coupling Reactions Involving Alkenyl-and Alkynyltrifluoroborates.-Optimal microwave-assisted reaction conditions are presented for Pd-catalyzed cross-coupling with a variety of aryl iodides.-(KABALKA*, G. W.;
Tetrahedron Letters, Oct 1, 2006
The allylation of potassium alkenyltrifluoroborates with allyl chloride via a palladium catalyzed... more The allylation of potassium alkenyltrifluoroborates with allyl chloride via a palladium catalyzed cross-coupling reaction occurs rapidly under microwave irradiation. The allylation reaction produces 1,4-pentadienes in high yields.
Chemical Communications, 1996
The palladium catalysed reactions of pronucleophiles 1 with allenylstannanes 2 or prop-2-ynylstan... more The palladium catalysed reactions of pronucleophiles 1 with allenylstannanes 2 or prop-2-ynylstannanes 3 give the corresponding additionsubstitution products 4 in reasonable to high yields; this double alkylation reaction most probably proceeds through an ...
Tetrahedron Letters, Mar 1, 2011
A direct cross-coupling reaction of benzoyl chlorides and potassium styryltrifluoroborates to the... more A direct cross-coupling reaction of benzoyl chlorides and potassium styryltrifluoroborates to the corresponding a,b-unsaturated aromatic ketones in the presence of PdCl 2 (d t bpf) catalyst under microwave heating is developed.
Tetrahedron Letters, Feb 1, 1998
The palladium catalyzed reaction ofallenes 1 with tosylhydrazinein the presenceof 1 equiv AcOH an... more The palladium catalyzed reaction ofallenes 1 with tosylhydrazinein the presenceof 1 equiv AcOH and 10 mol% dppf gave the corresoondin~ allylsufones 2 in moderate to good yields.
Tetrahedron Letters, Mar 1, 2014
A mixture of bismuth nitrate pentahydrate and potassium aryltrifluoroborate in toluene under micr... more A mixture of bismuth nitrate pentahydrate and potassium aryltrifluoroborate in toluene under microwave heating at 120 °C for 20 min provides an interesting and mild reaction protocol for the synthesis of aryl nitrite. The conversion to aryl nitrites from aryltrifluoroborates without transition metal catalyst and base in high yields is remarkable.
Tetrahedron Letters, Sep 1, 2009
... a Tennessee State University, Department of Chemistry, 3500 John A Merritt Blvd, Boswell 201,... more ... a Tennessee State University, Department of Chemistry, 3500 John A Merritt Blvd, Boswell 201, Nashville, TN 37209, USA. Received 12 May 2009; revised 18 June 2009; accepted 29 June 2009. Available online 4 July 2009. Abstract. ...
Chemical Communications, 1996
We previously reported that pronucleophiles 1 (H-Nu) add to the carbonxarbon double bond of allen... more We previously reported that pronucleophiles 1 (H-Nu) add to the carbonxarbon double bond of allenes in the presence of a palladium catalyst to give the corresponding alkenes in good to high yields (hydrocarbonation reaction). 1 The regiochemistry of the addition depends ...
Tetrahedron Letters, Feb 1, 1998
The [(~3-C3Hs)PdCI]2-dppf-AcOH catalytic system effected the hydroamination of conjugated enynes ... more The [(~3-C3Hs)PdCI]2-dppf-AcOH catalytic system effected the hydroamination of conjugated enynes I leading to the formation of (E)-isomer of alkenic 1,4-diamines in stereoselective fashion.
ChemInform, Aug 5, 2010
ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform, Aug 5, 2010
Palladium Catalyzed γ-Addition of Pronucleophiles to Allenyl Sulfides.-The addition of pronucleop... more Palladium Catalyzed γ-Addition of Pronucleophiles to Allenyl Sulfides.-The addition of pronucleophiles (II) and (IV) to sulfur-substituted allenes such as (I) or (VI) leads to the γ-addition products (III), (V), and (VII) with high regioselectivity and predominant (E)-selectivity. These results are in contrast to the addition behavior of oxygen-substituted allenes which form mainly α-addition products. This might be due to the strong electrophilic character of the α-carbon in alkoxy-or aryloxyallenes.
International Journal of Organic Chemistry, 2022
ChemInform, Dec 22, 2009
ABSTRACT An unprecedented cross-coupling reaction of potassium allyltrifluoroborates and aryl hal... more ABSTRACT An unprecedented cross-coupling reaction of potassium allyltrifluoroborates and aryl halides to the corresponding trans-β-methylstyrenes in the presence of PdCl2(dtbpf) catalyst under microwave heating was developed.
Tetrahedron Letters, Aug 1, 2008
ChemInform, Jun 22, 2010
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
International Journal of Organic Chemistry, 2012
After purging air through the mixture of aldehydes and amino alcohols and microwaved the reaction... more After purging air through the mixture of aldehydes and amino alcohols and microwaved the reaction mixture at 50˚C for minutes gave the corresponding oxazinanes, and oxazolidines in excellent yields.
Journal of Organic Chemistry, Jun 24, 2000
International Journal of Organic Chemistry, 2018
A microwave irradiated palladium-catalyzed reaction of carboxylic acids and crotyl type bromides ... more A microwave irradiated palladium-catalyzed reaction of carboxylic acids and crotyl type bromides creates series of esters in good to high yields. This facile ester synthesis then is applied to make esters from arachidonic acid, salicylic acid, folic acid, and aspirin efficiently.
Tetrahedron Letters, Aug 1, 2019
Esters are chemical compounds with many practical uses. The common type of esterification is call... more Esters are chemical compounds with many practical uses. The common type of esterification is called the Fischer esterification. Another one is by the action of acid chlorides on alcohols but not with tertiary alcohols. The stable carbenium ions formed from tertiary alcohols favor elimination and the byproduct, hydrogen chloride prevents ester formation. In this new report, palladium inserted ArCOPdCl species reacts with tertiary alcohols and cross-coupling under microwave heating, minimizes the formation of probable carbenium ion, and promotes successful production of highly substituted esters in good to high yields.
Tetrahedron Letters, Feb 1, 2006
Polyphenylalkene derivatives Q 0740 Microwave-Enhanced Cross-Coupling Reactions Involving Alkenyl... more Polyphenylalkene derivatives Q 0740 Microwave-Enhanced Cross-Coupling Reactions Involving Alkenyl-and Alkynyltrifluoroborates.-Optimal microwave-assisted reaction conditions are presented for Pd-catalyzed cross-coupling with a variety of aryl iodides.-(KABALKA*, G. W.;
Tetrahedron Letters, Oct 1, 2006
The allylation of potassium alkenyltrifluoroborates with allyl chloride via a palladium catalyzed... more The allylation of potassium alkenyltrifluoroborates with allyl chloride via a palladium catalyzed cross-coupling reaction occurs rapidly under microwave irradiation. The allylation reaction produces 1,4-pentadienes in high yields.
Chemical Communications, 1996
The palladium catalysed reactions of pronucleophiles 1 with allenylstannanes 2 or prop-2-ynylstan... more The palladium catalysed reactions of pronucleophiles 1 with allenylstannanes 2 or prop-2-ynylstannanes 3 give the corresponding additionsubstitution products 4 in reasonable to high yields; this double alkylation reaction most probably proceeds through an ...
Tetrahedron Letters, Mar 1, 2011
A direct cross-coupling reaction of benzoyl chlorides and potassium styryltrifluoroborates to the... more A direct cross-coupling reaction of benzoyl chlorides and potassium styryltrifluoroborates to the corresponding a,b-unsaturated aromatic ketones in the presence of PdCl 2 (d t bpf) catalyst under microwave heating is developed.
Tetrahedron Letters, Feb 1, 1998
The palladium catalyzed reaction ofallenes 1 with tosylhydrazinein the presenceof 1 equiv AcOH an... more The palladium catalyzed reaction ofallenes 1 with tosylhydrazinein the presenceof 1 equiv AcOH and 10 mol% dppf gave the corresoondin~ allylsufones 2 in moderate to good yields.
Tetrahedron Letters, Mar 1, 2014
A mixture of bismuth nitrate pentahydrate and potassium aryltrifluoroborate in toluene under micr... more A mixture of bismuth nitrate pentahydrate and potassium aryltrifluoroborate in toluene under microwave heating at 120 °C for 20 min provides an interesting and mild reaction protocol for the synthesis of aryl nitrite. The conversion to aryl nitrites from aryltrifluoroborates without transition metal catalyst and base in high yields is remarkable.
Tetrahedron Letters, Sep 1, 2009
... a Tennessee State University, Department of Chemistry, 3500 John A Merritt Blvd, Boswell 201,... more ... a Tennessee State University, Department of Chemistry, 3500 John A Merritt Blvd, Boswell 201, Nashville, TN 37209, USA. Received 12 May 2009; revised 18 June 2009; accepted 29 June 2009. Available online 4 July 2009. Abstract. ...
Chemical Communications, 1996
We previously reported that pronucleophiles 1 (H-Nu) add to the carbonxarbon double bond of allen... more We previously reported that pronucleophiles 1 (H-Nu) add to the carbonxarbon double bond of allenes in the presence of a palladium catalyst to give the corresponding alkenes in good to high yields (hydrocarbonation reaction). 1 The regiochemistry of the addition depends ...
Tetrahedron Letters, Feb 1, 1998
The [(~3-C3Hs)PdCI]2-dppf-AcOH catalytic system effected the hydroamination of conjugated enynes ... more The [(~3-C3Hs)PdCI]2-dppf-AcOH catalytic system effected the hydroamination of conjugated enynes I leading to the formation of (E)-isomer of alkenic 1,4-diamines in stereoselective fashion.
ChemInform, Aug 5, 2010
ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform, Aug 5, 2010
Palladium Catalyzed γ-Addition of Pronucleophiles to Allenyl Sulfides.-The addition of pronucleop... more Palladium Catalyzed γ-Addition of Pronucleophiles to Allenyl Sulfides.-The addition of pronucleophiles (II) and (IV) to sulfur-substituted allenes such as (I) or (VI) leads to the γ-addition products (III), (V), and (VII) with high regioselectivity and predominant (E)-selectivity. These results are in contrast to the addition behavior of oxygen-substituted allenes which form mainly α-addition products. This might be due to the strong electrophilic character of the α-carbon in alkoxy-or aryloxyallenes.