Highly anti-Selective Catalytic Aldol Reactions of Amides with Aldehydes
摘要:
Barium phenoxide-catalyzed, highly anti-selective direct-type aldol reactions of amides with aldehydes have been developed. In the presence of a slight excess amount of an amide, the desired reactions proceeded smoothly under mild conditions, and a wide range of aromatic, heterocyclic, alpha,beta-unsaturated aldehydes were applicable to afford the desired adducts in high yields with high anti-selectivities. A catalytic, enantioselective reaction of an amide with an aldehyde using a chiral ligand is also described.
Direct-type catalytic Mannich reactions of amides with imines
作者:Susumu Saito、Tetsu Tsubogo、Sh? Kobayashi
DOI:10.1039/b618490a
日期:——
Direct-type catalytic Mannich reactions of amides with imines proceeded smoothly using barium phenoxide as a catalyst to afford the desired adducts in high yields with high anti selectivities.
Highly <i>a</i><i>nti</i>-Selective Catalytic Aldol Reactions of Amides with Aldehydes
作者:Susumu Saito、Shu Kobayashi
DOI:10.1021/ja061221t
日期:2006.7.1
Barium phenoxide-catalyzed, highly anti-selective direct-type aldol reactions of amides with aldehydes have been developed. In the presence of a slight excess amount of an amide, the desired reactions proceeded smoothly under mild conditions, and a wide range of aromatic, heterocyclic, alpha,beta-unsaturated aldehydes were applicable to afford the desired adducts in high yields with high anti-selectivities. A catalytic, enantioselective reaction of an amide with an aldehyde using a chiral ligand is also described.
Acyclic ketene aminal phosphates derived from N,N-diprotected acetamides: stability and cross-couplings
作者:Alessandro B.C. Simas、Daniel L. de Sales、Karla C. Pais
DOI:10.1016/j.tetlet.2009.09.159
日期:2009.12
The synthesis of a stable ketene aminal phosphate (α-phosphoryloxy enecarbamate) derived from N,N-diprotected acetamide, bearing two different removable protectinggroups, is disclosed. This synthetic intermediate underwent successful palladium-catalyzed cross-coupling reactions to afford functionalized enynes and dienes.