Several α-fluorovinylphosphonates (6) have been synthesised from the Petersonolefination reaction applied to both aldehydes and ketones in conjunction with α-lithiated-α-fluoro-α-trimethylsilylmethylphosphonate (2). The reaction with aldehydes gives mainly the E-isomer whereas reaction with ketones gives mainly the Z-isomer. We propose a closed transition state to explain the results of our study
Monofluorophosphonates as phosphate mimics in bioorganic chemistry: a comparative study of CH2-, CHF- and CF2-phosphonate analogues of sn-glycerol-3-phosphate as substrates for sn-glycerol-3-phosphate dehydrogenase
作者:Jens Nieschalk、David O'Hagan
DOI:10.1039/c39950000719
日期:——
The synthesis of the cyclohexylammonium salts of 3-(S),4-dihydroxy-1(R,S)-fluorobutylphosphonic acid 3 and 1,1-difluoro-3-(S),4-dihydroxybutylphosphonic acid 4 is reported; 3 is a better substrate for NADH linked sn-glycerol-3-phosphate dehydrogenase than the difluoromethylenephosphonate 4; a comparative study of the CH2-, CHF and CF2- phosphonate analogues of sn-glycerol-3-phosphate is reported.
Synthesis of monofluoro- and difluoro- methylenephosphonate analogues of sn-glycerol-3-phosphate as substrates for glycerol-3-phosphate dehydrogenase and the X-ray structure of the fluoromethylenephosphonate moiety
作者:Jens Nieschalk、Andrei S Batsanov、David O'Hagan、Judith Howard
DOI:10.1016/0040-4020(95)00890-k
日期:1996.1
The synthesis of the cyclohexylammonium salts of (1RS, 3S)-3,4-dihydroxy-1-fluorobutylphosphonic acid 3 and (S)-difluoro-3,4-dihydroxybutylphosphonic acid 4 is reported. These compounds are fluorinated phosphonate analogues of sn-glycerol-3-phosphate where the bridging phosphate ester oxygen is replaced by CHF and CF2 respectively. Kinetic studies are presented for oxidation with NADHlinked glycerol-3-phosphate
The synthesis of α-monofluorovinylphosphonates by a Peterson type olefination reaction
作者:Angela Keeney、Jens Nieschalk、David O'Hagan
DOI:10.1016/s0022-1139(96)03460-4
日期:1996.9
The reaction of α-lithium-α-fluoro-α-trimethylsilyl-methylphosphonate 2 with aldehydes 3a-f leads to α-fluorovinylphosphonates 4a-f by a Peterson type olefination reaction.
Synthesis of Five-Membered Ring Systems Bearing <i>gem</i>-Difluoroalkenyl and Monofluoroalkenyl Substituents via Radical β-Bromo Fragmentation
作者:Peng Xu、Constantin G. Daniliuc、Klaus Bergander、Colin Stein、Armido Studer
DOI:10.1021/acscatal.2c03775
日期:2022.10.7
their synthesis; however, fast access to structurally diverse fluoroalkenes still remains a challenge. Herein, we report a radical β-bromo fragmentation approach to fluoroalkene moieties from terminal alkynes and gem-dibromofluoroalkanes, applying a well-designed photoinduced sequential radical addition–translocation–cyclization–fragmentation process. A series of structurally diverse, highly substituted