A convergent and stereoselective total synthesis of (−)-crispine A, (−)-benzo[a]quinolizidine and (−)-salsolidine
作者:N. Siva Senkar Reddy、B. Jagan Mohan Reddy、B.V. Subba Reddy
DOI:10.1016/j.tetlet.2013.05.132
日期:2013.8
A novel strategy has been developed for the syntheses of (−)-crispine, (−)-benzo[a]quinolizidine, and (−)-salsolidine using (R)-tert-butanesulfinamide as a source of chirality. The approach involves the stereoselective addition of Grignard reagent to chiral N-sulfinyl imine followed by cyclization of the secondary amide with a tethered halide as key steps.
使用(R)-叔丁亚磺酰胺作为手性来源,已经开发了一种用于合成(-)-crispine,(-)-苯并[ a ]喹啉嗪和(-)-salsolidine的新策略。该方法涉及将格氏试剂立体选择性地加入手性N-亚磺酰基亚胺中,然后将关键酰胺与束缚的卤化物环化成第二酰胺。