Epoxidation of Enol Silyl Ethers, Phosphates, Esters, and Lactones by Dimethyldioxirane
The epoxides 2a-u (Table 1) of the enol silyl ethers 1a, b, enol phosphates 1c-k, and enol esters and lactones 1l-u were prepared in excellent yields by epoxidation with isolated dimethyldioxirane (4) (as acetone solution).These labile epoxides (stable be
The novel epoxides 2 of a variety of enol phosphates 1 were readily prepared by epoxidation with dimethyldioxirane at subambient temperatures; at room temperature these labile epoxides 2 rearranged into the corresponding α-dialkoxyphosphinyloxy-substitute