Intermediates for producing enyne derivatives
US5359091A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1993 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Nov 18, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound of the formula: ##STR1## wherein R.sup.11 is hydrogen, lower alkyl, haloloweralkyl, lower alkenyl, lower alkynyl or cycloalkyl; R.sup.21 is a group of the formula: ##STR2## wherein each of R.sup.3, R.sup.31, and R.sup.32 which may be the same or different, is hydrogen or lower alkyl, each of R.sup.4, R.sup.5, R.sup.41 and R.sup.51, which may be the same or different, is hydrogen, halogen, hydroxyl, lower alkyl or lower alkoxy, R.sup.42 is hydroxyl, halogen, R.sup.8 --O--, or R.sup.6 --X--Y-- wherein R.sup.6 is phenyl or thienyl which may have one or two substituents each of X and Y, which may be the same or different, is oxygen, sulfur, carbonyl, --CHR.sup.8 -- or --NR.sup.b, or X and Y together form a vinylene group or an ethynylene group, provided that when either one of X and Y is oxygen, sulfur or --NR.sup.b, the other is carbonyl or --CHR.sup.a, and R.sup.7 is lower alkyl or cycloalkyl which may be substituted by hydroxy or lower alkoxy, phenyl or tri-lower alkylsilyl; and W is chlorine or bromine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.