Aminonitrile and cyanohydrin ethers as benzoyl anion equivalents in conjugate additions to substituted α cyclenones : comparative synthetic potentialities
作者:Michel Zervos、Lya Wartski、Jacqueline Seyden-Penne
DOI:10.1016/s0040-4020(01)88047-9
日期:1986.1
Lithiated aminonitrile and cyanohydrin ether are good nucleophilic benzoyl equivalents in conjugate addition to α cyclenones. is more sensitive to β substitution of the cyclenone than , as in THF it does not react with 3-methyl substituted cyclohexenones , . From 2-methyl and 2-fluorocyclenones and or , 2-subsyituted 3-benzoylcyclanones are stereoselectively obtained, provided that mild unmasking conditions
锂化的氨基腈和氰醇醚在α环酮的共轭物中是良好的亲核苯甲酰基当量。是更敏感β的cyclenone比的替代,如在THF它不与3-甲基取代的环己烯酮反应,。从2-甲基和2-氟环戊酮和或,立体选择性地获得2-取代的3-苯甲酰基环酮,条件是使用温和的解掩蔽条件。根据亲核试剂和烷基化剂的性质,讨论了导致2-取代的3-苯甲酰基环烷酮的中间烯醇化物的捕获。与甲硅烷基醚氰醇的比较显示了和的更广泛的合成有用性。