3-[2-{2-[4-(tert-Butoxycarbonylamino-methyl)-1-nitromethyl-cyclohexyl]-acetylamino}-2-(2,9,9-trimethyl-3,5-dioxa-4-bora-tricyclo[6.1.1.02,6]dec-4-yl)-ethyl]-2-methoxy-benzoic acid tert-butyl ester 、
三氯化硼 在
crude product 作用下,
生成
(R)-3-(2-(4-(aminomethyl)-1-(nitromethyl)cyclohexyl)acetamido)-2-hydroxy-3,4-dihydro-2H-benzo[e][1,2]oxaborinine-8-carboxylic acid