发明授权
US5043448A Asymmetric synthesis of furo(3,4-c) pyridine derivatives 失效
呋喃(3,4-c)吡啶衍生物的不对称合成

Asymmetric synthesis of furo(3,4-c) pyridine derivatives
摘要:
The invention relates to a method for the preparation of a non-racemic furo [3,4-c] pyridine derivatives of the formula I ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 stand for various substitutents, comprising adding a concentrated strong acid to a solution of a non-racemic compound of the formula II ##STR2## in an amount sufficient to catalyze a deprotection/cyclodehydration. These compounds are known antihypertensives.
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