Nickel-Catalyzed 1,4-Addition of Trialkylboranes to α,β-Unsaturated Esters: Dramatic Enhancement by Addition of Methanol
摘要:
[GRAPHICS]Nickel catalyst systems for 1,4-addition of trialkylboranes to alpha,beta-unsaturated esters have been developed. Addition of methanol was found to be essential for the alkylation reaction with 9-alkyl-9-BBNs.
Palladium-Catalyzed Carboxylative Coupling of Benzyl Chlorides with Allyltributylstannane: Remarkable Effect of Palladium Nanoparticles
摘要:
Palladium-catalyzed carboxylative coupling of benzyl chlorides with allyltributylstannane was successfully conducted to produce benzyl but-3-enoates in satisfactory to good yields. The carboxylative coupling reaction occurred smoothly under mild conditions in the presence of palladium nanoparticles in tetrahydrofuran.
A carboxamide can be produced in a high yield by a method for producing a carboxamide, for example, represented by formula (4):
(wherein R
1
and R
3
are as defined below), the method comprising a step of allowing a carboxylic acid ester represented by formula (1):
(wherein R
1
represents an optionally substituented C
1
-C
20
hydrocarbon group or an optionally substituented C
3
-C
20
heterocyclic group, and R
2
represents an optionally substituented C
1
-C
20
hydrocarbon group), an amine represented by formula (2):
R
3
—NH
2
(2)
(wherein R
3
represents a hydrogen atom or an optionally substituented C
1
-C
20
hydrocarbon group), and a formamide compound represented by formula (3):
(wherein R
3
is as defined above) to react in the presence of a metal alkoxide.
Palladium-Catalyzed Carboxylative Coupling of Benzyl Chlorides with Allyltributylstannane: Remarkable Effect of Palladium Nanoparticles
作者:Xiujuan Feng、Anle Sun、Sheng Zhang、Xiaoqiang Yu、Ming Bao
DOI:10.1021/ol303135e
日期:2013.1.4
Palladium-catalyzed carboxylative coupling of benzyl chlorides with allyltributylstannane was successfully conducted to produce benzyl but-3-enoates in satisfactory to good yields. The carboxylative coupling reaction occurred smoothly under mild conditions in the presence of palladium nanoparticles in tetrahydrofuran.
Nickel-Catalyzed 1,4-Addition of Trialkylboranes to α<i>,</i>β-Unsaturated Esters: Dramatic Enhancement by Addition of Methanol
作者:Koji Hirano、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1021/ol070288y
日期:2007.4.1
[GRAPHICS]Nickel catalyst systems for 1,4-addition of trialkylboranes to alpha,beta-unsaturated esters have been developed. Addition of methanol was found to be essential for the alkylation reaction with 9-alkyl-9-BBNs.