Process for the manufacture of benzoxazole, benzthiazole and ben

Details Process for the manufacture of benzoxazole, benzthiazole and ben Process for the manufacture of benzoxazole, benzthiazole and ben

1976-07-13

1977-12-20

Gallagher, Richard J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260158, 26029357, 26029358, 2602936, 260307D, 2603092, 2604655R, 260561A, 260562N, 548326, 548330, 560168, 560142, 560145, 560143, 560144, C07D27764, C07D20356, C07D23512, C07D23514

Patent

active

040641368

ABSTRACT:
Process for the manufacture of a heterocyclic compound of the formula I ##STR1## in which Y denotes a --CN, --COOR' or ##STR2## group, in which R' can be an optionally substituted alkyl or aryl radical and R" and R"' independently of one another can have the same meaning as R' or can be hydrogen or, conjointly with the nitrogen atom, can form a heterocyclic 5-membered or 6-membered ring and X denotes a --S-- or --O-- atom or a --NR"-- group and the ring A can carry non-ionic substituents or optionally substituted fused rings, wherein a nitrile of the formula II

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