Abstract:
Alpha -nitro-cinnamic acid derivatives which are useful in preparing phenylalanines, and a process for obtaining the derivatives by treating the corresponding cinnamic acid esters with nitric oxide or nitrogen dioxide.
Abstract:
A process for converting 17 Alpha -vinyl-17 Beta -hydroxy steroids to 17-(2-haloethylidene)-steroids, known intermediates for antifungal and progestational agents, by treating the 17 Alpha -vinyl-17 Beta -hydroxy steroids with vanadium tetrahalide.
Abstract:
METHODS FOR THE PREPARATION OF 2,3,3A,4,5,7,8,9,9AB,9BADECAHYDRO - 3AB-PRIMARY LOWER ALKYL-7-OXO-1H-BENZ(E) INDENES AND 4,4AB,4BA,5,6,7,8,8A,9,10-DECAHYDRO-8AB-PRIMARY LOWER ALKYL - 3H-PHENANTHREN-2-ONES BY CYCLIZING COMPOUNDS OF THE FORMULA WHERE R1 IS HYDROGEN OR LOWER ALKYL; Z'' IS CARBONYL OR CH(OR2''); R2'' IS HYDROGEN, LOWER AKYL, LOWER ALKANOYL, BENZOYL, NITROBENZOYL, CARBOXY-LOWER ALKANOYL, CARBOXYBENZOYL, TRIFLUOROACETYL OR CAMPHORSULFONYL; T'' IS -C(X'')=CH-, -C(OR3)=CH- OR -Q''-CH2-; R3 IS LOWER ALKYL; X'' IS BROMINE, CHLORINE OR IODINE; Q'' IS CARBONYL, LOWER ALKYLENE DIOXY-METHYLENE, DI-(LOWER ALKOXY)-METHYLENE OR HYDROXY-METHYLENE, R4 IS LOWER PRIMARY ALKYL AND M IS AN INTEGER HAVING A VALUE OF 1 OR 2. THE COMPOUNDS OF THIS SERIES ARE USEFUL AS INTERMEDIATES IN THE SYNTHESIS OF KNOWN STEROIDS WHICH ARE PHARMACOLOGICALLY ACTIVE AS FERTILITY CONTROL AGENTS.
Abstract:
The invention comprises (1) a process for preparing 20-hydroxypregnanes, 19-nor-pregnanes and 10a -pregnanes by reacting a 17-keto steroid of the androstane, 10a -androstane or estrane series, in which any other keto groups are protected, with ethylidene-triphenylphosphorane to obtain a D 17(20)-pregnane, hydroborating this, and treating the product with hydrogen peroxide at a pH greater than 7 to obtain a 20-hydroxy-pregnane, followed if desired by one or more of (a) 20-esterification or oxidation; (b) regeneration of a protected keto group; (c) 3-etherification, esterification or oxidation; or (d) a Birch reduction, with optional isomerization of the product, (11) 3-hydroxy, C1- 7 alkoxy or C1- 7 alkanoyloxy-19-nor - pregna - 1,3,5(10), 17(20) - tetraenes, and (111) 3b -hydroxy, C1- 7 alkoxy, or tetrahydropyranyloxy, or 3,3 alkylene - 9b , 10a - pregn-17(20) enes. 3,3 - Ethylenedioxy - 5b , 9b , 10a - androstan-17b -ol is prepared by conversion of 5b ,9b ,10a -androstan - 17b - ol - 3 - one to its 3 - ethylene ketal, followed by oxidation with chromium trioxide. The 19-nor-pregna-1,3,5(10)-tetraenes of the invention have estrogenic activity and may be used in pharmaceutical compositions in combination with a carrier, for example in forms suitable for oral administration.
Abstract:
Carbocyclic 17-ethylidene steroids or 17-ethylidene - des A - steroids are obtained in a process which comprises reacting a carbocyclic 17-oxo-steroid or 17-oxo-des A-steroid (in which all oxo groups other than the 17-oxo group are protected) with a phosphorus compound of the formula wherein each of the symbols R1 and R2 represent a C1-C5 alkyl or phenyl (C1-C5 alkyl) group or the symbols R1 and R2 together represent a tetramethylene, pentamethylene or 3-oxa-pentamethylene group and each of the symbols R3 and R4 represents a phenyl or substituted phenyl group or grouping of the formula Specified phosphorus compounds are ethylidenetris - (dimethylamino) - phosphorane, ethylidene - bis - (diethylamino) - phenyl - phosphorane, and ethylidene-diethylamino-diphenyl phosphorane. Any 17-oxo-steroid or 17 oxo-des A steroid may be employed irrespective of the stereoconfiguration of the rings therein. Phosphonium salts of the formula wherein R1, R2, R3 and R4 are as defined above and X is iodine are obtained by treating the appropriate NR1R2 - diphenyl-, bis - (NR1R2)-phenyl- or tris-(NR1R2)-phosphine with ethyliodide. Treatment of these salts with an acid binding agent yields the phosphoranes mentioned above.
Abstract:
The invention comprises (1) a process for preparing 20-hydroxypregnanes, 19-nor-pregnanes and 10a -pregnanes by reacting a 17-keto steroid of the androstane, 10a -androstane or estrane series, in which any other keto groups are protected, with ethylidene-triphenylphosphorane to obtain a D 17(20)-pregnane, hydroborating this, and treating the product with hydrogen peroxide at a pH greater than 7 to obtain a 20-hydroxy-pregnane, followed if desired by one or more of (a) 20-esterification or oxidation; (b) regeneration of a protected keto group; (c) 3-etherification, esterification or oxidation; or (d) a Birch reduction, with optional isomerization of the product, (11) 3-hydroxy, C1- 7 alkoxy or C1- 7 alkanoyloxy-19-nor - pregna - 1,3,5(10), 17(20) - tetraenes, and (111) 3b -hydroxy, C1- 7 alkoxy, or tetrahydropyranyloxy, or 3,3 alkylene - 9b , 10a - pregn-17(20) enes. 3,3 - Ethylenedioxy - 5b , 9b , 10a - androstan-17b -ol is prepared by conversion of 5b ,9b ,10a -androstan - 17b - ol - 3 - one to its 3 - ethylene ketal, followed by oxidation with chromium trioxide. The 19-nor-pregna-1,3,5(10)-tetraenes of the invention have estrogenic activity and may be used in pharmaceutical compositions in combination with a carrier, for example in forms suitable for oral administration.
Abstract:
A process for converting 17 alpha -vinyl-17 beta -hydroxy steroids to 17-(2-haloethylidene)-steroids, known intermediates for antifungal and progestational agents, by treating the 17 alpha -vinyl-17 beta -hydroxy steroids with vanadium tetrahalide.
Abstract:
The invention comprises (a) a process for preparing 3a b - methyl - 3b - (1 - hydroxy -ethyl)-benz[e] -indene derivatives, including hydrogenated derivatives thereof, by reaction of a 3-oxo-3a b -methyl-benz-[e]-indene derivative, in which any keto groups other than in the 3-position are protected, with ethylidene-triphenyl phosphorono, to form a 3-ethylidene benz-[e]-indene derivative, if desired splitting off any ketone-protecting groups present, reducing any such keto group to an hydroxy group and converting this into its C1- 7 alkyl or 2-tetrahydropyranyl ether, and treating the 3-ethylidene compound so obtained first with a source of hydroboron radicals and then, at a pH greater than 7, with hydrogen peroxide, and (b) 3-ethylidene-intermediates of formula wherein R1 is a hydrogen atom or a C1- 7 alkyl group and Z is a carbonyl group, a group wherein R3 is a C1- 7 alkylene group, or a group wherein R2 is a hydrogen atom or a C1- 7 alkyl or 2-tetrahydropyranyl group. The 3b -hydroxy-ethyl side-chain may be oxidized to a 3b -acetyl side-chain. 3a b ,6(a or b )-dimethyl-3-oxo-7,7-ethylenedioxy-5a (a or b )-9ab -9ba -perhydro-benz-[e]-indenes are prepared by ketalization of the corresponding 7-oxo-3-hydroxy-compounds to form the 3-hydroxy-7,7-ethylenedioxy derivatives, followed by oxidation with chromium trioxide. 3a b ,6b - dimethyl - 3b - hydroxy - 7 - oxo - 5ab , 9ab ,9ba -perhydrobenz-[e]-indene is prepared by catalytic hydrogenation of the corresponding 5a,6-dehydro-compound. Progesterone and 20-hydroxy-3-oxo-D 4-9b ,10a -pregnane are prepared by condensation of the corresponding des-A-5-oxo-steroid with methyl vinyl ketone.