Synthesis of chiral glycolurils from (S)-(+)- and (R)-(-)-1-sec-butyl-3-methylurea
作者:R. G. Kostyanovsky、G. K. Kadorkina、I. S. Bushmarinov、K. A. Lyssenko、I. I. Chervin、V. R. Kostyanovsky
DOI:10.1007/s10593-012-1055-6
日期:2012.8
tetraalkylglycolurils have been obtained using chiral (S)-(+)- and (R)-(-)-1-sec-butyl-3-methylurea as starting materials. The diastereomer (S)-(+)-2,6-di-sec-butyl-4,8-dimethyl-2,4,6,8-tetraazabicyclo[3.3.0]-octane-3,7-dione was separated into stereoisomers, for the higher melting of which the absolute configuration was determined as (S,S,S,S) by X-ray structural analysis.
使用手性的(S)-(+)-和(R)-(-)-1-仲丁基-3-甲基脲作为起始原料,获得了手性二烷基-和四烷基甘脲。分离非对映异构体(S)-(+)-2,6-二仲丁基-4,8-二甲基-2,4,6,8-四氮杂双环[3.3.0]-辛烷-3,7-二酮合成立体异构体,对于更高的熔点,其绝对构型通过X射线结构分析确定为(S,S,S,S)。