Investigation of the asymmetric Birch reduction–alkylation of a chiral 5-arylbenzamide containing a carbamate group
作者:Agustin Casimiro-Garcia、Arthur G. Schultz
DOI:10.1016/j.tetlet.2006.02.093
日期:2006.4
The synthesis and asymmetric Birch reduction–alkylation of chiral benzamide 17 are described. Birch reductive alkylation of benzamide 17 was optimized to give the corresponding cyclohexa-1,4-diene products in 66–78% isolated yield and with high diastereoselectivity (dr: >98:2). The effects of performing the reduction in the presence and in the absence of tert-butyl alcohol are discussed.
描述了手性苯甲酰胺17的合成和不对称的桦木还原-烷基化。优化了苯甲酰胺17的桦木还原烷基化反应,以66-78%的分离产率和高非对映选择性(dr:> 98:2)得到了相应的环己-1,4-二烯产物。讨论了在存在和不存在叔丁醇的情况下进行还原的效果。