2-氨基-6-甲基苯甲酸甲酯置于红铝体系中,用 甲苯 作为反应溶剂,化学反应 3.0H,以75%的收率获得产物2,3-二甲基苯胺 参考文献:Synthesis And Spectroscopic Characterization Of 1-13C-And 4-13C-Plastoquinone-9 标题:Synthesis And Spectroscopic Characterization Of 1-13C-And 4-13C-Plastoquinone-9 摘要: DOI:10.1002/1099-0690(200207)2002:13<2094::Aid-Ejoc2094>3.0.Co;2-E
专利号:US-10968174-B2 优先权日:2016-12-21 标题:Synthesis of a thiosulfonic acid by a step of periodate mediated oxidative coupling of a thiosulfonic acid with an aniline 发明人:SINCLAIR JAMES PETER; NICOLL SARAH LOUISE; STOREY JOHN MERVYN DAVID; LARCH CHRISTOPHER PAUL 权利人:WISTA LAB LTD 摘要:The present invention pertains generally to the field of chemical synthesis, and more particularly to methods for the chemical synthesis of a thiosulfonic acid of Formula (1) by a step of periodate mediated oxidative coupling of a thiosulfonic acid of Formula (2) with an aniline of Formula (3), as described herein. The present invention also relates to such methods which incorporate one or more additional (subsequent and/or preceding) steps, for example, to prepare compounds of Formula (5) from compounds of Formula (1); to prepare compounds of Formula (6) from compounds of Formula (5); and to prepare compounds of Formula (2) from compounds of Formula (4), as described herein.
专利号:US-8389716-B2 优先权日:2009-01-30 标题:Process for the synthesis of quetiapine 发明人:SERAFINI SIRO; TOMASI FILIPPO; GALVAGNI MARCO 权利人:SERAFINI SIRO; TOMASI FILIPPO; GALVAGNI MARCO; ITALIANA SINT SPA 摘要:The present invention relates to a process for the synthesis of quetiapine. In particular, a process is provided for the synthesis of quetiapine of formula (A) comprising reacting dibenzo[b,f][1,4]thiazepin-11(10H)-one, intermediate (I) with phosphorous oxychloride to give 11-chlorodibenzo[b,f][1,4]thiazepine, intermediate (II) wherein the said reaction of intermediate (I) to intermediate (II) is performed in an organic solvent in the presence of a mixture of an organic base together with an inorganic base.
专利号:US-5919969-A 优先权日:1996-06-05 标 题 :Synthesis of yellow couplers 发明人:CRAWLEY MICHAEL W 权利人:EASTMAN KODAK CO 摘要:The invention provides a method of synthesis of a image-dye forming coupler of formula (I) wherein X is a substituent linked to the coupler by an atom of oxygen, sulfur or nitrogen R1 is an alkyl or aryl group, R2 is a hydrogen atom or an alkyl group; R3 to R7 are the same or different and selected from a hydrogen atom and substituent groups; which method comprises the reaction of a compound of formula (II) wherein R and R1 are the same or different and are as defined above for R1 and X is as defined above with a compound of formula (III) wherein R2 to R7 are as defined above, in the presence of an inert organic solvent.
专利号:US-2004249115-A1 优先权日:2001-02-06 标题 :Methods of synthesis of poly(succinimide-aspartate) copolymer by end-capping polymerization 发明人:SWIFT GRAHAM; REDLICH GEORGE H 摘要:Disclosed are methods of synthesis of copoly(succinimide-aspartate), copolymers and derivatives thereof, prepared in a thermal or supercritical fluid method in the presence of an end capping initiator. Also disclosed are methods of isolating, compounding, stabilizing and processing the copoly(succinimide-aspartate), and its derivatives.
专利号:US-11325912-B2 优先权日:2019-05-09 标题 :Regio-selective synthesis of imidazo[1,2-a]pyrimidines 发明人:CLAGG KYLE BRADLEY PASCUAL; WHITE NICHOLAS ANDREW; ZHANG HAIMING; GOSSELIN FRANCIS; NACK WILLIAM; O'SHEA PAUL D 权利人:GENENTECH INC 摘要:A method of regio-selectively synthesizing an imidazo-pyrimidine compound of formulae (XXa) or (XXb)comprising a step of coupling a first compound of formula XX-P1a or XX-P1b with a second compound of formula XX-P2This annulation reaction between β-ethoxy acrylamides and phosphorylated aminoimidazoles to furnish imidazo[1,2-a]pyrimidin-amines relies on steering effects from endocyclic and exocyclic phosphorylated aminoimidazoles. The reaction furnishes either 2-amino or 4-amino constitutional isomers of imidazo[1,2-a]pyrimidines with good yields and ranges of 90:10-99:1 regio-selectivity. The reaction is useful in the synthesis of various tracer molecules used in the study of neurological conditions such as where R3 and R4 together with the imidazole ring atoms to which they are bonded form a phenyl ring and the products are substituted benzimidazopyrimidines. The reaction can be generalized to form imidazo[1,2-a]pyrimidines substituted at either of their 2- and 4-positions by alkoxy or thioalkyl groups.
专利号:US-8461384-B2 优先权日:2006-12-11 标 题 :Preparation of amides from an acid and amine for intermediates in the synthesis of morphinans 发明人:WANG PETER X; MOSER FRANK W; GROTE CHRISTOPHER W; CANTRELL GARY L 权利人:WANG PETER X; MOSER FRANK W; GROTE CHRISTOPHER W; CANTRELL GARY L; MALLINCKRODT LLC 摘要:The present invention is directed to processes for the synthesis of morphinans. In particular, a process for coupling a carboxylic acid compound with an amine compound to form an amide product that can then be isolated or the crude amide product can be cyclized to form a 3,4-dihydroisoquinoline. In one embodiment, the carboxylic acid contains a phenol moiety protected with a labile protecting group. The protected phenol reduces reaction times, simplifies work-up of the product, and reduces the amount of cyclizing agent, POCl 3 that is necessary to form the 3,4-dihydroisoquinoline.