5-carboxy-2-chloromethyloxazole 、
(2-Formyl-3-hydroxy-11-methoxycarbonylmethyl-14-methyl-6,7,10,11,17,18-hexahydro-9H-8,16,19-trioxa-5,11-diaza-dibenzo[a,g]cyclopentadecen-5-yl)-acetic acid methyl ester 在
sodium iodide
potassium carbonate 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 4.0h,
以26%的产率得到2-[12,18-Bis(2-methoxy-2-oxoethyl)-8-methyl-2,5,15,22-tetraoxa-12,18-diazatetracyclo[17.7.0.06,11.021,25]hexacosa-1(19),6(11),7,9,20,23,25-heptaen-23-yl]-1,3-oxazole-5-carboxylic acid