CAS: 2556-53-8; Calciummethoxide

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CAS号67-56-1 甲醇 | CAS号7440-70-2 钙 | CAS号75-20-7 电石

专利信息

专利号:US-7906661-B2
优先权日:2004-06-29
标 题 :Semi-synthetic conversion of paclitaxel to docetaxel
发明人：NAIDU RAGINA; FOO SAMUEL SIANG KIANG; XUE BAOYU; FAN BO
权利人:CHATHAM BIOTEC LTD
摘要:A process is provided for the semi-synthesis of taxane derivatives useful in the preparation of docetaxel, in particular, the semi-synthesis of protected taxane derivatives in a one pot reaction of protecting the C-2′, C-7 and C-10 positions and introducing a t-Boc group at the nitrogen of the amide group at the C-3′ position in paclitaxel and subsequently conversion to docetaxel, and derivatives used therein.

专利号:WO-2011116933-A1
优先权日:2010-03-24
标 题 :Process for the preparation of 2-substituted 4-amino-5-cyanopyrimidines
发明人：DICK VIKTOR; HANSELMANN PAUL; KRAMER RAINER; LADNAK VIKTOR
权利人:LONZA AG; DICK VIKTOR; HANSELMANN PAUL; KRAMER RAINER; LADNAK VIKTOR
摘要:A compound of the formula (I), wherein R 1 is C 1-4 alkyl or phenyl, is prepared by reacting a dicyanomethanide of the formula: M r n + [CH(CN) 2 ] rÌ… n (II), wherein M is an alkali or alkaline earth metal and r is 1 or 2, with carbon monoxide to obtain a dicyanoethenolate of the formula: M r n + [(NC) 2 C=CH–O] rÌ… (III), which is acylated to obtain an acyloxymethylenemalononitrile of the formula: (NC) 2 C=CH–OCOR 2 (IV), wherein R 2 is C 1-4 alkyl, which in turn is reacted with an amidine of the formula (V) to obtain the 4-amino-5-cyanopyrimidine of the formula (I). The compound of formula (I), wherein R is methyl, is an intermediate in a synthesis of thiamin (vitamin B 1 ).

专利号:US-8816125-B2
优先权日:2006-12-23
标 题 :Process for the continuous preparation of (cyclo)aliphatic diisocyanates
发明人：MICHALCZAK HANS-WERNER; KOHLSTRUK STEPHAN; KRECZINSKI MANFRED; GRUND GERDA; LOMOELDER RAINER
权利人:MICHALCZAK HANS-WERNER; KOHLSTRUK STEPHAN; KRECZINSKI MANFRED; GRUND GERDA; LOMOELDER RAINER; EVONIK DEGUSSA GMBH
摘要:The invention relates to a multi-stage process for the continuous, phosgene-free preparation of (cyclo)aliphatic diisocyanates that comprises the conversion of (cyclo)aliphatic diamines into the corresponding (cyclo)alkylene biscarbamates and the thermal cleaving of the latter into the (cyclo)alkylene diisocyanates and alcohol. The urea used in accordance with the invention and also the urea employed for the preparation of urea equivalents (e.g. alkyl carbonates, alkyl carbamates) as a possible precursor for the synthesis of the (cyclo)aliphatic biscarbamates is unconditioned.

专利号:WO-2025104679-A1
优先权日:2023-11-16
标题 :Processes for making intermediates for isoindolinone inhibitors of the mdm2-p53 interaction having anticancer activity
发明人：SHAKYA SAGAR; JOHNSON MATT; WONG NICHOLAS; BODHURI PRABHUDAS; DAVAR NIPUN
权利人:OTSUKA PHARMA CO LTD
摘要:The present disclosure relates to processes for preparing synthetic intermediates for the synthesis of isoindolinone inhibitors of the MDM2-p53 interaction having anticancer activity.

专利号:US-9246173-B2
优先权日:2012-11-16
标题 :Process for synthesis of hybrid siloxy derived resins and crosslinked networks therefrom
发明人：GERBEC JEFFREY A
权利人:MITSUBISHI CHEM CORP
摘要:A hybrid siloxy derived resin and a method of making them and a method of applying them as a benign passivant on electrochemical electrodes is provided. These resins are made by the process of reacting a silane and an alkaline, transition metal or metalloid alkoxide, in the presence of a lewis acid. The methods described do not require further purification steps; heat; or strong acid/base catalysis to initiate hydrolysis.

专利号:US-6620824-B2
优先权日:2001-04-11
标 题:Process for the synthesis of gonadotropin releasing hormone antagonists
发明人：CHUNG JOHN Y L; FARR ROGER N; HUMPHREY GUY R
权利人:MERCK & CO INC
摘要:The present invention relates to a process for preparing a compound of gonadotropin releasing hormone antagonists having a Formula I, n in an efficient way, which involves preparation of key intermediates: 2-arylindole core; a chiral aziridine, in particular chiral nosyl aziridine; and an amine salt. The key process involves the coupling reaction of 2-arylindole and nosyl aziridine under boron trifluoride catalysis, which provides the final compound with unprecedented regioselectivity and enantioselectivity.