CAS: 304-81-4; Phenazine-N-Oxide

上下游产品

Phenazin aniline bis(2-nitrophenyl)ether N-acetyl-N-phenyl-o-nitroanilinePhenazin 2-chlorophenazine 2-nitrophenazine 10-oxide 1-nitro-phenazine 5-oxide

专利信息

专利号:US-6242602-B1
优先权日:1999-03-29
标 题:One pot synthesis of 5,10-dihydrophenazine compounds and 5,10-substituted dihydrophenazines
发明人：GIRI PUNAM; BYKER HARLAN J; BAUMANN KELVIN L
权利人:GENTEX CORP
摘要:Dihydrophenazines and bis(dihydrophenazines) are prepared in high yield under commercially viable reaction conditions by reacting a catechol with a 1,2-diaminoaryl compound, wherein either the catechol or the 1,2-diaminoaryl compound is provided in at least 50% molar stoichiometric excess. The product may be oxidized to the corresponding phenazine, but is preferably derivatized at one or both of the 5,10-positions to form a monosubstituted or disubstituted dihydrophenazine or bis(dihydrophenazine). Most preferably, 5,10-dialkyl-5,10-dihydrophenazines are prepared starting from catechol and 1,2-diaminoaryl compound in a one pot synthesis. The products are useful as dyes, and in particular as chromophores in electrochromic systems.

专利号:US-2016073631-A1
优先权日:2013-03-04
标 题 :Process for the preparation of dihydropyrrole derivatives
发明人：EL QACEMI MYRIEM; SMITS HELMARS; CASSAYRE JEROME YVES; MULHOLLAND NICHOLAS PHILLIP; RENOLD PETER; GODINEAU EDOUARD; PITTERNA THOMAS
权利人:SYNGENTA PARTICIPATIONS AG; SYNGENTA LTD
摘要:The present invention provides stereoselective processes for the preparation of compounds of formula (I) n n n n n n n n n n n n wherein n P is phenyl, naphthyl, a 6-membered heteroaryl group containing one or two nitrogen atoms as ring members, or a 10-membered bicyclic heteroaryl group containing one or two nitrogen atoms as ring members, and wherein the phenyl, naphthyl and heteroaryl groups are optionally substituted; n R 1 is chlorodifluoromethyl or trifluoromethyl; n R 2 is optionally substituted aryl or optionally substituted heteroaryl; n n is 0 or 1; n including the process comprising n (a-i) reacting a compound of formula II n n n n n n n n n n n n n n n n wherein P, R 1 and R 2 are as defined for the compound of formula I; n with nitromethane in the presence a chiral catalyst to give a compound of formula III n n n n n n n n n n n n n n n n wherein P, R 1 and R 2 are as defined for the compound of formula I; and n (a-ii) reductively cyclising the compound of formula III to give the compound of formula I. n n n n n The invention also provides intermediates useful for processes for the synthesis of compounds of formula (I).

专利号:CN-113121458-B
优先权日:2021-04-16
标 题 :A kind of method for the rapid synthesis of 2,3-diaminophenazine catalyzed by ultrasonic radiation

专利号:RU-2014320-C1
优先权日:1987-09-15
标题:Method of synthesis of propenoic acid derivatives and their stereoisomers

专利号:RU-2178413-C2
优先权日:1995-12-04
标 题 :Method of synthesis of 3-amino-1,2,4-benzotriazine-1,4-dioxide (variants)

专利号:RU-2140908-C1
优先权日:1994-12-19
标题 :Derivatives of benzamide oxime, method of their synthesis and fungicide agent for protection of agriculture plants