(2S,4R)-methyl 1-((S)-3-(tert-butoxycarbonylamino)-2-((2,2-dimethylhex-5-enyloxy)carbonylamino)propanoyl)-4-(4-vinyl-2,3-dihydro-1H-isoindoline-2-carbonyloxy)pyrrolidine-2-carboxylate 在
1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene[2-(1-propoxy)-5-(N,N-dimethylaminosulfonyl)phenyl]methyleneruthenium (II) 作用下,
以
1,1-二氯乙烷 为溶剂,
以70%的产率得到methyl (1R,21S,24S)-16,16-dimethyl-21-[[(2-methylpropan-2-yl)oxycarbonylamino]methyl]-3,19,22-trioxo-2,18-dioxa-4,20,23-triazatetracyclo[21.2.1.14,7.06,11]heptacosa-6,8,10,12-tetraene-24-carboxylate