Synthesis of chiral 1-benzyl-1,2,3,4-tetra-hydroisoquinolines by
申请人:The United States of America as represented by the Department of Health
公开号:US04727146A1
公开(公告)日:1988-02-23
In a short total synthesis of morphinan compounds, derivatives of 1-benzyl-1,2,3,4-tetrahydroisoquinoline are produced. Certain of these compounds, although highly aromatic and functionalized, can be optically resolved. The optically active enantiomers can serve as important intermediates for both natural and unnatural opioids. As a special function of this invention, certain of the derivatives, namely 4'-6' and 7'-9', may be hydrogenated to 1'-3' derivative by asymmetric reduction either of the catalytic or chemical type.
A novel 13-aza-14-oxo-TXA.sub.2 analogue of general formula: ##STR1## wherein symbol A represents --CH.sub.2 CH.sub.2 --(CH.sub.2).sub.m --, cis--CH.dbd.CH--(CH.sub.2).sub.m --, --CH.sub.2 O--(CH.sub.2).sub.m --, --S--(CH.sub.2).sub.m -- ##STR2## R.sup.2 represents a bond or a straight or branched alkylene or alkenylene group of from 1 to 10 carbon atom(s) unsubstituted or substituted; R.sup.3 represents (i) a phenyl, phenoxy or phenylthio group unsubstituted or substituted, (ii) a straight or branched alkyl, alkenyl or alkynyl group of from 1 to 6 carbon atom(s) unsubstituted or substituted, (iii) a cycloalkyl, cycloalkyloxy or cycloalkylthio group of from 4 to 7 carbon atoms unsubstituted or substituted, (iv) a naphthyl, indolyl or indanyl group, or (v) an amino group unsubstituted or substituted R.sup.4 represents a hydrogen atom or a methyl group.
Homopolymers and copolymers of cationically polymerizable monomers and
申请人:The B.F. Goodrich Company
公开号:US05677405A1
公开(公告)日:1997-10-14
The invention discloses methods of preparing copolymers from norbornene-type monomers and cationically polymerizable monomers or polymers from catalytically polymerizable monomers by employing Group VIII transition metal ion source in a solvent for said monomers at a temperature in the range from -100.degree. C. to 120.degree. C. Also disclosed are copolymers from norbornene-type monomers and catalytically polymerizable monomers.
Intermediates in the process for preparing epothilones
申请人:Novartis AG
公开号:US06043372A1
公开(公告)日:2000-03-28
The invention relates to a process for the production of epothilones and intermediate products within the process. Epothilones A and B are natural substances, which can be produced by microorganisms, and the taxols have similar properties and are thus of particular interest in pharmaceutical chemistry.
Process for the production of epothilones and intermediate products
申请人:Novartis AG
公开号:US05969145A1
公开(公告)日:1999-10-19
The invention relates to a process for the production of epothilones and intermediate products within the process. Epothilones A and B are natural substances, which can be produced by microorganisms, and the taxols have similar properties and are thus of particular interest in pharmaceutical chemistry.