Treatment of 2-acyl (or sulfonyl)-1-cyano-1, 2-dihydroisoquinolines with bromine and CH3OH gave 2-acyl (or sulfonyl)-4-bromo-1-cyano-3-methoxy-1, 2, 3, 4-tetrahydroisoquinolines in a highly stereoselective manner in high yields. The stereochemistry, with 1, 4-cis and 3, 4-trans configurations, was determined by X-ray crystallography.
用
溴和CH3OH处理2-酰基(或磺酰基)-1-
氰基-1, 2-二氢
异喹啉,得到2-酰基(或磺酰基)-4-
溴-1-
氰基-3-甲氧基-1, 2, 3,以高度立体选择性的方式高产率生产 4-
四氢异喹啉。通过 X 射线晶体学测定立体
化学,具有 1, 4-顺式和 3, 4-反式构型。