(5R,8S,11S)-11-ethenyl-5-methyl-8-propan-2-yl-10-oxa-3,17-dithia-7,14,19,20-tetrazatricyclo[14.2.1.12,5]icosa-1(18),2(20),16(19)-triene-6,9,13-trione 、
S-pent-4-enyl octanethioate 在
1,3-bis-(2,4,6-trimethylphenyl)-2-(imidazolidinylidene)dichloro(5-nitro-2-isopropoxyphenylmethylene)ruthenium 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 3.0h,
以69%的产率得到S-[5-[(5R,8S,11S)-5-methyl-6,9,13-trioxo-8-propan-2-yl-10-oxa-3,17-dithia-7,14,19,20-tetrazatricyclo[14.2.1.12,5]icosa-1(18),2(20),16(19)-trien-11-yl]pent-4-enyl] octanethioate