Chemical process

Details Chemical process Chemical process

1983-03-14

1985-06-04

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Diazo or diazonium

204158R, 204158HE, 544 71, 544 90, C07D49804

Patent

active

045213372

ABSTRACT:
A process for the preparation of a compound of the formulae (Ia) and/or (Ib): ##STR1## wherein R.sup.1 and R.sup.2 are independently substituted or unsubstituted hydrocarbon groups or are joined together so as to form a carbocyclic or heterocyclic ring, and R.sup.3 is a substituted or unsubstituted hydrocarbon group; which process comprises the ring-closing cyclization of a compound of the formula (II): ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are as defined in relation to formulae (Ia) and (Ib).

REFERENCES:
patent: 4245089 (1981-01-01), Ponsford et al.
patent: 4443599 (1984-04-01), Smale

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