5,6,7,8-tetrahydro-5-oxo-4-methoxymethyl-β-carboline-3-carboxylic acid ethyl ester 、
异丙醇 在
titanium(IV) isopropylate 氩 作用下,
反应 1.5h,
以0.135 g of 4-methoxymethyl-5-oxo-5,6,7,8 -tetrahydro-beta-carboline-3-carboxylic acid isopropyl ester with a melting point of 243°-245° C. is obtained的产率得到5,6,7,8-tetrahydro-5-oxo-4-methoxymethyl-β-carboline-3-carboxylic acid isopropyl ester