摘要:
An alternative synthetic approach to diaryl ethers has been developed. In the key transformation, Robinson annulation of nonracemic aldehydes 16a,b, derived from L-glutamic acid 5-methyl ester and phenoxymethylvinyl ketone, provided alpha-phenoxyenones 17a,b. The Cbz-protected oxazolidine 17b was further converted into the diaryl ether 18b utilizing an oxidative selenation protocol. (C) 1999 Elsevier Science Ltd. All rights reserved.