Preparation of 7-(diphenylmethyl)oxy-9A-methoxymitosane
US5175303A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1991 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Sep 27, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D487/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
7-(Diphenylmethyl)oxy-9a-methoxymitosane is a novel intermediate for conversion into 7-amino and 7-oxy-9a-methoxymitosanes and is also useful for inhibiting mammalian tumor growth. The compound is prepared by reacting 7-hydroxy-9a-methoxymitosane with diazodiphenylmethane. In a preferred reaction, the compound is prepared from mitomycin C via 7-hydroxy-9a-methoxymitosane without drying (water removal). The intermediate is advantageously converted to the very effective anti-tumor agent 7-[2-(4-nitrophenyldithio) ethylamino]-9a-methoxymitosane in unexpectedly high yields using a two step process where the first step constitutes conversion to 7-[2-(2-pyridyldithio) ethylamino]-9a-methoxymitosane. or 7-[2-(3-nitro-2-pyridyldithio)ethylamino]-9a-methoxymitosane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.