偶氮二甲酸二异丙酯 、
(2E,9E,11E,18E,20E,22E)-(5S,7R,8R,13S,15R,16S,17R)-7,13-Bis-benzyloxy-5-(2-benzyloxy-ethyl)-15-hydroxy-17-methoxy-8,12,16,18,22-pentamethyl-23-(2-methyl-oxazol-4-yl)-tricosa-2,9,11,18,20,22-hexaenoic acid 在
三苯基膦 作用下,
以69%的产率得到propan-2-yl N-[(2E,5S,7R,8R,9E,11E,13S,15R,16S,17R,18E,20E,22E)-15-hydroxy-17-methoxy-8,12,16,18,22-pentamethyl-23-(2-methyl-1,3-oxazol-4-yl)-7,13-bis(phenylmethoxy)-5-(2-phenylmethoxyethyl)tricosa-2,9,11,18,20,22-hexaenoyl]-N-(propan-2-yloxycarbonylamino)carbamate