Anatomy of ene and Diels–Alder reactions between cyclohexadienes and azodicarboxylates
作者:Gérard Jenner、Ridha Ben Salem
DOI:10.1039/p29900001961
日期:——
high-pressure kinetics of the enereaction between cyclohexa-1,4-diene and diethyl azodicarboxylate show a concerted transition state. The discrepancy is assigned to the enhanced rigidity of the cyclohexadiene molecule with orthogonal hydrogen transfer to the nitrogen atom. Cyclohexa-1,3-diene reacts with diethyl azodicarboxylate according to a concerted Diels–Alder reaction.
与其他(CH 3 H = N)氢转移相反,环己-1,4-二烯与偶氮二羧酸二乙酯之间的烯反应的高压动力学表现出一致的过渡态。差异归因于环己二烯分子具有增加的刚性,且氢垂直转移至氮原子。根据一致的Diels-Alder反应,环己-1,3-二烯与偶氮二羧酸二乙酯反应。
A Facile and Convenient Synthesis of 1,2,3,6-Tetrahydropyridazines Using Azodicarboxylates under Lanthanum Triflate Catalysis
The hetero-Diels-Alder reaction catalyzed by lanthanum triflate hydrate using diethyl azodicarboxylate as dienophile, yielding differently substituted 1,2,3,6-tetrahydropyridazines, is described.
Pirsch; Joergl, Chemische Berichte, 1935, vol. 68, p. 1324,1329
作者:Pirsch、Joergl
DOI:——
日期:——
De novo syntheses of enantiopure glycosyl donors of D-/L-azapurpurosamine C type — enzymatic asymmetrizations
作者:Stefan Grabowski、Horst Prinzbach
DOI:10.1016/0040-4039(96)01831-x
日期:1996.10
Glycosyl donors of type 1 are synthesized starting from known cycloadducts of 1,3-cyclohexadiene with azo dienophiles and by utilizing biocatalytic asymmetrizations as access to the pure antipodes. Copyright (C) 1996 Elsevier Science Ltd
JENNER, GERARD;SALEM, RIDHA BEN, J. CHEM. SOC. PERKIN TRANS. PT 2,(1990) N1, C. 1961-1964