The first organocatalyst-mediated enantioselective substitution of racemic iodoalkanes under radical conditions
摘要:
We have demonstrated for the first time an organocatalyst-mediated enantioselective substitution of racemic iodoalkanes at either a tertiary or a secondary stereogenic center leading to the corresponding optically active products with a tertiary or a quaternary allylated stereogenic center under radical conditions. (C) 2008 Elsevier Ltd. All rights reserved.
The intramolecular hydroacylation of 1,2-disubstituted alkenes was considered to be a challenging task due to the side reactions resulted from the lack of additional substituent at 1-position and the low activity caused by the steric hindrance of substituent at 2-position, and an asymmetric version has not been considered possible due to problems associated with the racemization of the products. We
Deaminative and Decarboxylative Catalytic Alkylation of Amino Acids with Ketones
作者:Nishantha Kalutharage、Chae S. Yi
DOI:10.1002/anie.201307766
日期:2013.12.16
It cuts two ways: The cationic [Ru‐H] complex catalyzesselective coupling of α‐ and β‐amino acids with ketones to form α‐alkylated ketone products. The reaction involves CC and CNbondcleavage which result in regio‐ and stereoselective alkylation using amino acids. A broad substrate scope and high functional‐group tolerance is demonstrated.
它有两种切割方式:阳离子 [Ru-H] 络合物催化 α- 和 β- 氨基酸与酮的选择性偶联,形成 α-烷基化的酮产物。该反应涉及 C C 和 C N 键断裂,导致使用氨基酸进行区域和立体选择性烷基化。证明了广泛的底物范围和高官能团耐受性。
The first organocatalyst-mediated enantioselective substitution of racemic iodoalkanes under radical conditions
We have demonstrated for the first time an organocatalyst-mediated enantioselective substitution of racemic iodoalkanes at either a tertiary or a secondary stereogenic center leading to the corresponding optically active products with a tertiary or a quaternary allylated stereogenic center under radical conditions. (C) 2008 Elsevier Ltd. All rights reserved.