专利号:US-6207863-B1 优先权日:1998-08-11 标题 :Synthesis of haloformimine compounds 发明人:BERRIER JOHN VINCENT; UMARVADIA ASHUTOSH SUMANTRAI 权利人:ROHM & HAAS 摘要:Disclosed is an improved method for the preparation of highly pure haloformimine compounds in high yields by reacting a formimine compound in a solvent with a halogenating agent while maintaining the pH of the halogenation reaction in the range of 2 to 5. The pH of the reaction may be maintained by a variety of means, such as by the addition of a base.
专利号:US-6133473-A 优先权日:1998-06-25 标 题 :Synthesis of carbamate compounds 发明人:BERRIER JOHN VINCENT 权利人:ROHM & HAAS 摘要:Disclosed is a method for the preparation of carbamate compounds substantially free of by-products; the carbamate compounds being prepared by reacting an isocyanate with a hydroxylated compound in the presence of certain catalysts that increase the rate of carbamylation while decreasing the rate of by-product formation.
专利号:US-4644072-A 优先权日:1985-04-12 标 题 :Intermediates for the production of epipodophyllotoxin and related compounds and processes for the preparation and use thereof 发明人:VYAS DOLATRAI M; SKONEZNY PAUL M 权利人:BRISTOL MYERS CO 摘要:There is provided a novel and efficient stereoselective total synthesis of epipodophyllotoxin and related epipodophyllotoxin compounds of the general formula ##STR1## wherein R 1 and R 2 each are independently hydrogen or (lower)alkoxy, or R 1 and R 2 , taken together, is methylenedioxy; R 4 and R 6 each are independently hydrogen or (lower)alkoxy; and R 5 is hydrogen or a phenol-protecting group; or an acid addition salt thereof. The present invention also provides novel intermediates and processes for the preparation of said intermediates, which are then converted into known antineoplastic agents.
专利号:US-5086182-A 优先权日:1985-04-12 标题:Intermediates for the production of epipodophyllotoxin and related compounds and processes for the preparation and use thereof 发明人:VYAS DOLATRAI M; SKONEZNY PAUL M 权利人:BRISTOL MYERS CO 摘要:There is provided a novel and efficient stereoselective total synthesis of epiodophyllotoxin and related epipodophyllotoxin compounds of the general formula wherein R1 and R2 are independently hydrogen or (lower)-alkoxy, or R1 and R2, taken together, is methylenedioxy; R4 and R6 each are independently hydrogen or (lower) alkoxy; and R5 is hydrogen or a phenol-protecting group; or an acid addition salt thereof. The present invention also provides novel intermediates and processes for the preparation of said intermediates, which are then converted into known antineoplastic agents.
专利号:US-4728740-A 优先权日:1985-04-12 标 题:Intermediates for the production of epipodophylotoxin and related compounds and processes for the preparation and use thereof 发明人:VYAS DOLATRAI M; SKONEZNY PAUL M 权利人:BRISTOL MYERS CO 摘要:There is provided a novel and efficient stereoselective total synthesis of epipodophyllotoxin and related epipodophyllotoxin compounds of the general formula wherein R1 and R2 each are independently hydrogen or (lower)alkoxy, or R1 and R2, taken together, is methylenedioxy; R4 and R6 each are independently hydrogen or (lower)alkoxy; and R5 is hydrogen or a phenol-protecting group; or an acid addition salt thereof. The present invention also provides novel intermediates and processes for the preparation of said intermediates, which are then converted into known antineoplastic agents.
专利号:US-4795819-A 优先权日:1985-04-12 标 题 :Intermediates for the production of epipodophyllotoxin and related compounds and processes for the preparation and use thereof 发明人:VYAS DOLATRAI M; SKONEZNY PAUL M 权利人:BRISTOL MYERS CO 摘要:There is provided a novel and efficient stereoselective total synthesis of epipodophyllotoxin and related epipodophyllotoxin compounds of the general formula ##STR1## wherein R 1 and R 2 each are independently hydrogen or (lower)alkoxy, or R 1 and R 2 , taken together, is methylenedioxy; R 4 and R 6 each are independently hydrogen or (lower)alkoxy; and R 5 is hydrogen or a phenol-protecting group; or an acid addition salt thereof. The present invention also provides novel intermediates and processes for the preparation of said intermediates, which are then converted into known antineoplastic agents.