420119-86-4Relevant academic research and scientific papers
Visible-Light-Promoted Metal-Free Aerobic Oxidation of Primary Amines to Acids and Lactones
Cheng, Xiaokai,Yang, Bo,Hu, Xingen,Xu, Qing,Lu, Zhan
, p. 17566 - 17570 (2016)
A unique metal-free aerobic oxidation of primary amines via visible light photocatalytic double carbon–carbon bonds cleavage and multi carbon–hydrogen bonds oxidation was observed. Aerobic oxidation of primary amines could be controlled to afford acids by using dioxane with 18 W CFL, and lactones by using DMF with 8 W green LEDs, respectively. A plausible mechanism was proposed based on control experiments. This observation showed direct evidences for the fragmentation in the aerobic oxidation of aliphatic primary amines.
Electrocatalytic Dehydrogenative Esterification of Aliphatic Carboxylic Acids: Access to Bioactive Lactones
Zhang, Sheng,Lian, Fei,Xue, Mengyu,Qin, Tengteng,Li, Lijun,Zhang, Xu,Xu, Kun
supporting information, p. 6622 - 6625 (2017/12/26)
A scalable and efficient electrocatalytic dehydrogenative esterification is reported. With an indirect electrolysis strategy, both intra- and intermolecular-type reactions were amenable to this practical method. With n-Bu4NI as the catalyst, un
Preparation of α-Acyloxy Ketones via Visible-Light-Driven Aerobic Oxo-Acyloxylation of Olefins with Carboxylic Acids
Zhang, Qing-Bao,Ban, Yong-Liang,Zhou, Da-Gang,Zhou, Pan-Pan,Wu, Li-Zhu,Liu, Qiang
supporting information, p. 5256 - 5259 (2016/11/02)
We developed a visible-light driven oxo-acyloxylation of aryl alkenes with carboxylic acids and molecular oxygen. A metal-free photoredox system, consisting of an acridinium photocatalyst, an organic base, and molecular sieve (MS) 4 ?, promotes chemoselective aerobic photooxidation of aryl alkenes. This approach may provide a green, practical, and metal-free protocol for a wide range of α-acyloxy ketones.
Calcium iodide catalyzed photooxidative oxylactonization of oxocarboxylic acids using molecular oxygen as terminal oxidant
Tada, Norihiro,Ishigami, Takafumi,Cui, Lei,Ban, Kazunori,Miura, Tsuyoshi,Itoh, Akichika
supporting information, p. 256 - 258 (2013/02/23)
We developed aerobic photooxidative oxylactonization of oxocarboxylic acids catalyzed by calcium iodide using molecular oxygen as the terminal oxidant under photo irradiation.
Facile aerobic photooxidative oxylactonization of oxocarboxylic acids in fluorous solvents
Tada, Norihiro,Cui, Lei,Ishigami, Takafumi,Ban, Kazunori,Miura, Tsuyoshi,Uno, Bunji,Itoh, Akichika
supporting information, p. 3007 - 3009,3 (2020/09/16)
We developed efficient aerobic photooxidative oxylactonizations of oxocarboxylic acids promoted by trifluoroacetic anhydride with molecular oxygen as the terminal oxidant in the fluorous solvent FC-72.
DDQ-promoted dehydrogenation from natural rigid polycyclic acids or flexible alkyl acids to generate lactones by a radical ion mechanism
Ding, Ye,Huang, Zhangjian,Yin, Jian,Lai, Yisheng,Zhang, Shibo,Zhang, Zhiguo,Fang, Lei,Peng, Sixun,Zhang, Yihua
supporting information; experimental part, p. 9495 - 9497 (2011/10/31)
A novel and facile DDQ-mediated dehydrogenation from natural rigid polycyclic acids or flexible alkyl acids to generate lactones is described. The formation of lactones proceeds by a radical ion mechanism, which has been established by DPPH?-mediated chemical identification, ESR spectroscopy and an enol intermediate trapping.
Hypervalent iodine(III) sulfonate mediated synthesis of 5-benzoyldihydro-2(3H)-furan-one in ionic solvent
Hou, Rei-Sheu,Wang, Huey-Min,Lin, Yu-Chien,Chen, Ling-Chieg
, p. 649 - 656 (2007/10/03)
The room temperature ionic liquid, n-butylpyridinium tetrafluoroborate(BPyBF4) is used as a "green" recyclable solvent for the reaction of 4-benzoylbutyric acid with [hydroxy-(2,4-dinitrobenzenesulfonyloxy)iodo]-benzene (HDNIB) to prepare 5-benzoyldihydro-2(3H)-furanone.
Phenyliodine(III) triflate mediated synthesis of 5-benzoyldihydro-2(3H)- furanones
Hou, Rei-Sheu,Wang, Huey-Min,Lin, Yu-Chien,Chen, Ling-Ching
, p. 1029 - 1032 (2007/10/03)
A direct and efficient method for the preparation of 5-benzoyldihydro-2(3H) -furanones was realized by cyclization of 4-benzoylbutyric acids in the presence of phenyliodine(III) triflate.
Preparation of resin bound [hydroxy(tosyloxy)iodo] benzene and its use in 5-benzoyldihydro-2 (3H)-furanone synthesis
Huang, Xian,Zhu, Qing,Zhang, Jizheng
, p. 480 - 481 (2007/10/03)
A new type of polymer supported hypervalent iodine reagent, which is sufficiently reactive for the formation of 5-benzoyldihydro-2(3H)-furanone from 4-benzoylbutyric acid, has been prepared by a convenient method; the poly(4-iodostyrene), formed in the ra
Tetrahydropyridazinone derivatives, processes for their preparation and their use
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, (2008/06/13)
Tetrahydropyridazinones of the formula I STR1 wherein R denotes an optionally substituted carbocyclic or heterocyclic radical, R1 denotes hydrogen; alkyl; aralkyl, which is optionally substituted in the aryl part; or acyl, and R2 den
