草酰氯 、 2-((benzofuran-3-yl)-1-(R)-aminoethyl)boronic acid (1S,2S,3R,5S)-(+)-pinane-2,3-diol ester hydrochloride 、
(1S,2R,4R)-7-oxabicyclo[2.2.1]heptane-2-amine 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以53 mg的产率得到((R)-1-(2-(((1S,2R,4R)-7-oxabicyclo[2.2.1]heptan-2-yl)amino)-2-oxoacetamido)-2-(benzofuran-3-yl)ethyl)boronic acid-(1S,2S,3R,5S)-(+)-pinane-2,3-diol ester