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1.发明专利
公开(公告)号：DE2440406A1
公开(公告)日：1976-03-04
申请号：DE2440406
申请日：1974-08-23
Applicant: BASF AG
IPC: C07C49/613 , C07C49/54
Abstract: 1-Alkenyl-per hydro-indan-4-one derivs. of formula (I) (where R1 is H or a satd. or olefinically unsatd. 1-6C aliphatic hydrocarbon residue which can contain oxygen in the form of OH gps. or readily cleavable ether gps; R2 is H or 1-4C alkyl; and one of the broken lines represents an additional C-C bond) e.g. 1-isopropylidene 7a-methylperhydroindan-4-one, are new cpds. (I) are useful as inters. for vitamin D3 and for 17- or 20-keto steroids. (I;R1 = CH3, double bond exocyclic) (Ib) is also useful as an inter. for the alcohol of formula (V) which is an odorant with menthol to camphor-like notes.
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公开(公告)号：DE2942646A1
公开(公告)日：1981-04-30
申请号：DE2942646
申请日：1979-10-22
Applicant: BASF AG
Inventor： OHLINGER MANFRED DIPL CHEM DR , VAETH GUENTER , MUELLER NORBERT DIPL CHEM DR , WETTSTEIN EUGEN
Abstract: A process for the manufacture of ferromagnetic chromium dioxide modified with foreign elements, by reacting oxides of trivalent and hexavalent chromium under superatmospheric pressure at an elevated temperature in the presence of water and of antimony(III) oxide as modifier, with or without other modifiers in an amount not exceeding 15% by weight, wherein the antimony(III) oxide employed as modifier is, to the extent of more than one-third, present as the senarmontite cubic modification, has a specific surface area, measured by the BET method, of from 1.5 to 15 m2/g, and is added in a total amount of up to 0.5% by weight, based on the resulting chromium dioxide.
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Patent Agency Ranking
公开(公告)号：DE2700261A1
公开(公告)日：1978-07-13
申请号：DE2700261
申请日：1977-01-05
Applicant: BASF AG
Inventor： ROSSY PHILLIP A DIPL CHEM DR , HOFFMANN WERNER DIPL CHEM DR , MUELLER NORBERT DIPL CHEM DR
IPC: C07D333/38
Abstract: Prepn. of thiophen carboxylic acids of formula (I) is effected by reaction of a 3-ketothiphan carboxylic acid (II) with a sulphonic acid: R4. SO2Y (III) to give a 3-sulphato deriv. then reacting the product with an alkali metal polysulphide. The resulting cpd. is treated with a sulphuric acid chloride or bromide or with Cl2 to give modified polysulphide which is finally treated with ahalogen and water. In the formula R is CO2R3 or H; R2 is H whe R' is -CO2R3; or R' is -CO2R3 when R' is H; R3 is H or an aliphatic group; X is halo; R4 is an aliphatic or aromatic group; Y is halo, the group OR3 or a group -O3S.R4. Provides simple, more economic process for prodn. of (I) which is intermediate for thiophen-saccharin sweetening agents. A typical cpd. methyl-3-chlorosulphonylthiophen-4-carboxylate, was prepd. by the 4-stage process from methyl 3-hydroxy-dihydrothiophen-4-carboxylate.
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公开(公告)号：DE2545657A1
公开(公告)日：1977-04-21
申请号：DE2545657
申请日：1975-10-11
Applicant: BASF AG
IPC: C07B57/00 , C07B31/00 , C07C67/00 , C07C209/00 , C07C209/26 , C07C211/38 , C07D307/32 , C07C87/40 , C07B19/00
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公开(公告)号：DE2511410A1
公开(公告)日：1976-09-30
申请号：DE2511410
申请日：1975-03-15
Applicant: BASF AG
Inventor： HOFFMANN WERNER DIPL CHEM DR , MUELLER NORBERT DIPL CHEM DR , FRAUNBERG KARL VON DIPL CHEM D
IPC: C07D311/94 , C07D313/00 , C11B9/00
Abstract: New macrocyclic ketolactones, especially 15-methyl-15-ethyl- and 15,15-dimethyl-12-oxo-15-hydroxytetradecanecarboxylic acid lactone.
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公开(公告)号：DE2400189A1
公开(公告)日：1975-07-17
申请号：DE2400189
申请日：1974-01-03
Applicant: BASF AG
Inventor： MUELLER NORBERT DIPL CHEM DR
IPC: C07J9/00
Abstract: In a process for the technical prodn. of 1 alpha-hydroxycholesterols of formula (I) (where R1 and R2 are H or OH), e.g., 1 alpha-hydroxy-cholesterol itself, by redn. of 1alpha, 2alpha-epoxy-3-keto-cpds. of formula (II): in liq. NH3, as solvent in the presence of a proton donor, the redn. is carried out with a 2- to 200-fold excess of sodium. (I) are inters. for highly active vitamin D3 derivs. Yields of 50-61.5% are obtd, compared with 45-52% when more expensive Li is used as reducing agent.
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