PREPARATION OF 2-TETRAZOLE-BENZOPYRAN DERIVATIVES; TETRAZOLE INTERMEDIATES AND THEIR PREPARATION

摘要

PCT No. PCT/EP93/03257 Sec. 371 Date May 26, 1995 Sec. 102(e) Date May 26, 1995 PCT Filed Nov. 19, 1993 PCT Pub. No. WO94/12492 PCT Pub. Date Jun. 9, 1994Disclosed herein is a process for preparing a compound of structure (I): IMAGE (I) which comprises cyclization of a compound of structure (II) IMAGE (II)