Unusual stereospecificity in the hydrogenation of an isopropenyl function with Wilkinson's catalyst; a route to chiral methyl valine
作者:David H. G. Crout、Max Lutstorf、Philip J. Morgan、Robert M. Adlington、Jack E. Baldwin、Michael J. Crimmin
DOI:10.1039/c39810001175
日期:——
Catalytic hydrogenation with H3H in the presence of Wilkinson's catalyst of (2RS)-(E)-[4-2H]-2-acetylamino-3-methylbut-3-enoic acid gave a mixture of (2SR, 3SR, 4RS)-[4-3H2H]-N-acetylvaline [(8) and (9)] and 2SR, 3RS, 4SR-[4-3H2H]-N-acetylvaline [(6) and (7)] in the radio 19:1 by 3H n.m.r. spectroscopy of the derived valines; a similar reduction with 2H2 of 1,5-(Z)-4, 7-DIAZA-7-[1-4-(nitrobenzylox
在(2 RS)-((E)-[4- 2 H] -2-乙酰氨基-3-甲基丁-3-烯酸的威尔金森催化剂存在下,用H 3 H催化加氢得到(2 SR,3 SR,4 RS)-[4- 3 H 2 H] -N-乙酰基缬氨酸[(8)和(9)]和2 SR,3 RS,4 SR- [4- 3 H 2 H] -N-乙酰基缬氨酸[ (6)和(7)]在广播19:1中乘3缬氨酸的H nmr光谱; 1,5-(Z)-4,7-DIAZA-7- [1-4-(硝基苄氧基羰基)-2-甲基丙-2-烯基] -3-苯氧基甲基-2-硫代双环[ 2 H 2的类似还原3.2.0]庚-3-烯-6-酮通过1 H nmr光谱法以3:7的比例得到衍生的缬氨酸的二氘代异构体(11)和(12)的混合物。