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trifluorormethanesulfonic acid mercury(II) oxide dihydrogen peroxide mercury bis(trifluoromethanethiolate)phosgene trifluoromethylsulfonic anhydride carbonyl dibromide trifluoromethanesulfonic acid trichlormethylester 专利信息
专利号:US-4769451-A
优先权日:1985-08-15
标 题:Synthesis of carbapenems using n-substituted azetidinones
发明人:DEXTRAZE PIERRE
权利人:BRISTOL MYERS CO
摘要:A novel process is disclosed for converting known 3,4-disubstituted azetidinones to carbapenems. The process proceeds through novel N-substituted intermediates and then cyclizes to the 4-position of the azetidinone to form the carbapenem.
专利号:US-4973687-A
优先权日:1985-08-15
标 题:Synthesis of carbapenems using N-substituted azetidinones
发明人:DEXTRAZE PIERRE
权利人:BRISTOL MYERS CO
摘要:This invention provides novel azetidinone intermediates having the formulas: ##STR1## wherein R 1 is hydrogen, or a conventional hydroxy-protecting groups; R 2 , R 4 , and R 5 are independently selected from the group consisting of hydrogen; substituted and unsubstituted: alkyl, alkenyl, and alkynyl having from 1-10 carbon atoms; cycloalkyl, cycloalkylalkyl, and alkylcycloalkyl having 3-6 carbon atoms in the cycloalkyl ring and 1-6 carbon atoms in the alkyl moieties; spirocycloalkyl having 3-6 carbon atoms; phenyl; aralkyl, aralkenyl, and aralkynyl wherein the aryl moiety is phenyl and the aliphatic portion has 1-6 carbon atoms; or various heterocyclic moieties; and R 6 is methanesulfonyl or p-toluenesulfonyl; which are useful in the preparation of carbapenem antibiotics.
专利号:CN-114573631-A
优先权日:2022-03-10
标 题:A method for one-step synthesis of paclitaxel side chain and analogs thereof by utilizing three-component reaction and application thereof
专利号:CN-111100101-A
优先权日:2019-12-23
标题 :A kind of catalytic synthesis method of 3-benzofuranone compounds
专利号:CN-116836198-A
优先权日:2023-07-25
标 题 :A kind of synthesis method of 2-aryl-4-phosphono-4H-chromene compound
专利号:CN-114478319-A
优先权日:2022-01-25
标 题:Synthesis method of dicyano isophorone derivative and application of dicyano isophorone derivative in detection of mercury ions