摘要:
This invention concerns product and process to convert a hydroxyl group (bold in R3C—OH) in a tigliane-type compound to a hydrogen (bold in R3C—H) to obtain deoxytigliane-type compounds or structural or functional analogs thereof. The process has wide application particularly to produce specific biologically active compounds in quantity for use as pharmaceuticals. In particular the process can be used to convert phorbol to a 12-deoxytigliane (prostratin), which is a therapeutic lead for the treatment of AIDS. New compositions of matter are also disclosed.
摘要:
A process for preparing substituted pentacene compounds comprises the step of cyclizing substituted bis(benzyl)phthalic acids using an acid composition comprising trifluoromethanesulfonic acid, the substituted bis(benzyl)phthalic acids being represented by the following general formulas: wherein each R (that is, each of the groups R1 through R8) is independently an electron-donating group, a halogen atom, a hydrogen atom, or a combination thereof.
摘要:
Disclosed herein are a naphthoquinone derivative represented by the following formula: ##STR1## wherein R.sup.1 means a hydrogen atom or methyl group, R.sup.2 is a hydrogen atom or methyl group, n stands for 0 or an integer of 1-9, and a linkage is a single bond or double bond with the proviso that if n is an integer of 2-9, the linkages may be identical with or different optionally from each other, such as a vitamin K derivative; and a process for producing the naphthoquinone derivative at a high yield without forming any geometric isomer; as well as 1,4,4.sub.a,5,8,9.sub.a -hexahydro-4.sub.a .alpha.-alkenyl-1.alpha.,4.alpha.-methanoanthraquinone derivatives and 1,4,4.sub.a,5,8,9.sub.a -hexahydro-1.alpha.,4.alpha.-methanoanthraquinone derivatives which are useful as intermediates for the preparation of the naphthoquinone derivatives.
摘要:
Aliphatic cyclobutene compositions according to the formula ##STR1## can be homopolymerized or copolymerized with a variety of comonomers, including bismaleimides, to produce tough, low dielectric constant resins.
摘要:
The present invention relates to novel indene derivatives with the general formula I: ##STR1## wherein R.sup.1 is (a) a phenyl group optionally substituted with one or two groups selected from halogen, lower alkyl, lower alkoxy, lower alkylthio, lower alkylsulfonyl, dilower alkylamino, acylamino such as acetylamino, cyano, trifluoromethyl, trifluoromethoxy, pyrrole and dilower alkylpyrrole,(b) a polycyclic aromatic or heteroaromatic group, such as naphthalene or quinoline,(c) a heteroaromatic group such as thiophene, pyridine, and pyrrole, optionally substituted with one or more groups selected from halogen, lower alkyl, lower alkoxy, lower alkylthio, trifluoromethyl or trifluoromethoxy,R.sub.2 is selected from H, halogen, lower alkyl, benzyl, lower alkylthio, methoxy, lower alkylsulfonyl, dilower alkylsulfamoyl, acylamino such as acetylamino, benzylamino, dilower alkylamino, cyano, pyrrole, dilower alkylpyrrole, trifluoromethyl and trifluoromethoxy,R.sup.3 is CN, COOR.sup.4, --CON(R.sup.4).sub.2 or COR.sup.4, where R.sup.4 is a lower alkyl group, and "n" is an integer of from 1-3 inclusive.The indene derivatives of formula I are, when R.sup.1 is as defined under (a) above, valuable intermediates which are useful in the preparation of pharmacologically effective indane and indene derivatives known from e.g. U.S. Pat. Nos. 4,443,448 and 4,525,360.Moreover, the invention relates to a method for the preparation of the compounds of formula I and to a method for the preparation of compounds of the following formula IV: ##STR2## wherein R.sup.1, R.sup.2 and "n" are as defined above.
摘要:
Novel 2,4-dihydrocarbylspiro[5.5]undeca-1,4,8-trien-3-one compounds are prepared by reacting an N,N-dihydrocarbyl,2,6-dihydrocarbyl-4-aminomethylphenol with a conjugated diene and an alkyl halide in a liquid solvent medium.
摘要:
TETRACYCLIC STEROIDAL MOLECULE MAY BE PREPARED BY SIMULTANIOUS CYCLIZATION OF THE A AND B RING. THE SUBSTRATE FOR THIS CYCLIZATION PROCESS IS A BICYCLIC POLYKETONE. THE REACTION IS CONDUCTED IN THE PRESENCE OF AN ACID OR PREFERABLY AN ACID-BASE COMPLEX SYSTEM. IN A SPECFIC EMBODIMENT 4-(3,7-DIOXO-OCTYL) - LA - METHYLPERHYDROINDAN1,5-DIONE IS CONVERTED INTO 19-NOR-ANDROSTA-4,9(10)-DIEN3,17-DIONE IN THE PRESENCE OF PIPERIDINE ACETATE. THE STEROIDAL COMPOUNDS PREPARED BY THE PROCESS DESCRIBED HEREIN ARE USEFUL INTERMEDIATES IN THE PREPARATION OF STEROIDS HAVING VALUABLE PHARMACOLOGICAL ACTIVITY.