Aza and oxo Diels–Alder reactions using cis-cyclohexadienediols of microbial origin: chemoenzymatic preparation of synthetically valuable heterocyclic scaffolds
摘要:
Aza and oxo Diels-Alder reactions using enantiopure cis-cyclohexadienediols were studied. These dienediols were obtained from the biotransformation of monosubstituted arenes using bacterial dioxygenases (toluene and benzoate dioxygenases). Ethyl glyoxylate and its N-tosyl imine were used as dienophiles to afford the corresponding hetero Diels-Alder bicyclic adducts with excellent regio- and stereoselectivities. Quantum chemical calculations at the B3LYP/6-31+G(d,p) level of theory were performed to rationalize the observed selectivities especially the stereochemical aspects of the cycloadditions. The synthetic importance of these adducts is highlighted for the preparation of enantiopure 2,2,3,4,5,6-hexasubstituted piperidine and tetrahydropyran from toluene. (c) 2015 Elsevier Ltd. All rights reserved.
Chemoenzymatic Synthesis of Advanced Intermediates for Formal Total Syntheses of Tetrodotoxin
作者:Daler Baidilov、Lukas Rycek、John F. Trant、Jordan Froese、Brennan Murphy、Tomas Hudlicky
DOI:10.1002/anie.201804602
日期:2018.8.20
Advanced intermediates for the syntheses of tetrodotoxin reported by the groups of Fukuyama, Alonso, and Sato were prepared. Key steps include the toluene dioxygenase mediated dihydroxylation of either iodobenzene or benzyl acetate. The resulting diene diols were transformed into Fukuyama's intermediate in six steps, into Alonso's intermediate in nine steps, and into Sato's intermediate in ten steps
Boyd, Derek R.; Sharma, Narain D.; Byrne, Breige, Journal of the Chemical Society. Perkin transactions I, 1998, # 12, p. 1935 - 1943
作者:Boyd, Derek R.、Sharma, Narain D.、Byrne, Breige、Hand, Mark V.、Malone, John F.、Sheldrake, Gary N.、Blacker, John、Dalton, Howard
DOI:——
日期:——
Enantiomeric excess and absolute configuration determination of cis-dihydrodiols from bacterial metabolism of monocyclic arenes
作者:Derek R. Boyd、M. R. J. Dorrity、M. V. Hand、J. F. Malone、N. D. Sharma、H. Dalton、D. J. Gray、G. N. Sheldrake
DOI:10.1021/ja00002a040
日期:1991.1
BOYD, D. R.;DORRITY, M. R. J.;HAND, M. V.;MALONE, J. F.;SHARMA, N. D.;DAL+, J. AMER. CHEM. SOC., 113,(1991) N, C. 666-667
作者:BOYD, D. R.、DORRITY, M. R. J.、HAND, M. V.、MALONE, J. F.、SHARMA, N. D.、DAL+
DOI:——
日期:——
Aza and oxo Diels–Alder reactions using cis-cyclohexadienediols of microbial origin: chemoenzymatic preparation of synthetically valuable heterocyclic scaffolds
作者:Mariana Pazos、Sebastián Martínez、María Agustina Vila、Paola Rodríguez、Nicolás Veiga、Gustavo Seoane、Ignacio Carrera
DOI:10.1016/j.tetasy.2015.10.015
日期:2015.12
Aza and oxo Diels-Alder reactions using enantiopure cis-cyclohexadienediols were studied. These dienediols were obtained from the biotransformation of monosubstituted arenes using bacterial dioxygenases (toluene and benzoate dioxygenases). Ethyl glyoxylate and its N-tosyl imine were used as dienophiles to afford the corresponding hetero Diels-Alder bicyclic adducts with excellent regio- and stereoselectivities. Quantum chemical calculations at the B3LYP/6-31+G(d,p) level of theory were performed to rationalize the observed selectivities especially the stereochemical aspects of the cycloadditions. The synthetic importance of these adducts is highlighted for the preparation of enantiopure 2,2,3,4,5,6-hexasubstituted piperidine and tetrahydropyran from toluene. (c) 2015 Elsevier Ltd. All rights reserved.