Aldol reactions in polypropionate synthesis: High π-face selectivity of enol borinates from α-chiral methyl and ethyl ketones under substrate control
作者:Ian Paterson、Jonathan M. Goodman、Masahiko Isaka
DOI:10.1016/s0040-4039(01)93440-9
日期:——
Use of (c-C6H11)2BCl in the anti-selective aldol reaction of the α-chiral ethylketone 2 leads to high stereoselectivity (>94%) for the 1,2-anti-2,4-anti isomer 7. The related α-chiral methylketone aldol reaction, 8 → 9, proceeds with 84–93% diasteroselectivity for a range of boron reagents.
在α-手性乙酮2的抗选择性羟醛反应中使用(c -C 6 H 11)2 BCl会导致1,2-抗-2,4-抗异构体7具有较高的立体选择性(> 94%)。相关的α-手性甲基酮醛醇缩醛反应8 → 9,对一系列硼试剂的非对映选择性为84–93%。