Hydrazine hydrate (1:1) → HCID 70615240, compound

Participants

Reaction Steps

Methyl 3-[2-(3-t-butylamino-2-hydroxypropoxy)-4-methylbenzoyl]propionate was cyclised with hydrazine hydrate in a manner similar to that described in Example 2(ii) to give 6-[2-(3 -t-butylamino-2-hydroxypropoxy)-4-methylphenyl]-4,5-dihydro-3(2H)-pyridazinone (m.p. 129.5°-130.5° C). The hydrochloride, crystallised from ethanol-ether, had m.p. 206.5°-209.5° C.

Provenance & Evidence