The β′,β-elimination reaction of the ester 1 gives cis-cyclo-octene in > 70% yield; the corresponding reactions of the stereoselectively deuterium labelled compounds (1a) and (1b) show that the elimination is syn.
AUBERT, C.;BEGUE, J. -P.;BIELLMANN, J. -F., J. CHEM. SOC. CHEM. COMMUN., 1984, N 6, 351-352
作者:AUBERT, C.、BEGUE, J. -P.、BIELLMANN, J. -F.
DOI:——
日期:——
AUBERT C.; BEGUE J. -P.; BIELLMANN J. -F., TETRAHEDRON, 42,(1986) N 20, 5581-5590
作者:AUBERT C.、 BEGUE J. -P.、 BIELLMANN J. -F.
DOI:——
日期:——
Selective biocatalytic hydroxylation of unactivated methylene C–H bonds in cyclic alkyl substrates
作者:Md Raihan Sarkar、Samrat Dasgupta、Simon M. Pyke、Stephen G. Bell
DOI:10.1039/c9cc02060h
日期:——
The cytochrome P450 monooxygenase CYP101B1 from Novosphingobium aromaticivorans selectively hydroxylated methylene C–H bonds in cycloalkyl rings. Cycloketones and cycloalkyl esters containing C6, C8, C10 and C12 rings were oxidised with high selectively on the opposite side of the ring to the carbonyl substituent. Cyclodecanone was oxidised to oxabicycloundecanol derivatives in equilibrium with the
The elimination of lithium, magnesium and aluminium enolatea of isobutyrates of medium ring cyclanols occurs in a syn fashion. A set of experimental procedures is presented. This elimination seems to be restricted to strained systems. The stereo-chemistry has been determined on stereospecifically deuterated cyclooctanol isobutyrates. The primary isotope effect kH/k2 was 3.0 ± 0.1 and the secondary
中环环醇的异丁酸酯的锂,镁和铝烯醇盐的消除以同步方式发生。提出了一组实验程序。这种消除似乎仅限于紧张的系统。立体化学已经在立体特异性氘化的环辛醇异丁酸酯上确定。一级同位素效应k H / k 2为3.0±0.1,二级同位素效应为1.1。为此同步消除和相关消除建议使用名称“β'β消除”。