Diastereofacial selectivity via aldol reactions using ethyl dithioacetate and ethyl dithiopropionate enolates
作者:A.I. Meyers、Robert D. Walkup
DOI:10.1016/s0040-4020(01)96754-7
日期:1985.1
The lithium enolate of ethyldithioacetate reacts with α-methyl aldehydes to yield the aldol products in which the syn configuration in the positions β and γ to the thiocarbonyl of the product is favored over the anti configuration. This selectivity is solvent-dependent, and is enhanced at lower temperatures. In most cases, syn:anti product ratios obtained under these conditions varied from 57:43 to