在对二甲苯作为敏化剂的存在下,对环己烯和相应的三烷基硼烷的混合物进行辐照,然后用碱性H 2 O 2连续氧化光解产物,可通过立体选择获得顺式-2-烷基环己醇。1-乙基环己烯的类似反应产生2,2-二烷基环己醇。环庚烯还与硼烷反应以提供顺式-2-烷基环庚醇。通过假定高度应变的反式-环己烯或-庚烯为反应性物质来解释这些反应。光化学产生的反式-环-辛-2-烯酮和顺式,反式-环-辛基-2,7-二烯酮与硼热反应,分别得到3-烷基环辛酮和顺式-7-烷基环辛-2-烯酮。cr啶与硼烷的光反应导致还原性烷基化,以相当好的收率得到9-烷基ac啶。
Conformational effects on lipase-mediated acylations of 2-substituted cyclohexanols
作者:Rikuhei Tanikaga、Yoshimasa Matsumoto、Maki Sakaguchi、Yohei Koyama、Kentaro Ono
DOI:10.1016/s0040-4039(03)01514-4
日期:2003.8
Lipase-mediated acetylations of trans- and cis-2-substituted cyclohexanols gave the corresponding (1R)-cyclohexyl acetates and (IS)-cyclohexanols in high yields and ee, but c-4-tert-butyl-c-2-ethenyl-r-l-cyclohexanoI was unreactive owing to the steric interaction between the axial OH group and the axial H atoms at the 3- and 5-positions. In the cis-isomer the OH group occupies an equatorial position to bind to the lipase, and less bulky axial alkenyl and alkynyl groups might not so much prevent acetylations than an alkyl group. (C) 2003 Elsevier Ltd. All rights reserved.
Vavon; Guedon, Bulletin de la Societe Chimique de France, 1930, vol. <4> 47, p. 901,905
作者:Vavon、Guedon
DOI:——
日期:——
Kinetics and activation parameters for the reduction of alkylcyclohexanones by lithium tri-tert-butoxyaluminohydride
作者:Donald C. Wigfield、Frederick W. Gowland
DOI:10.1021/jo01292a021
日期:1980.2
MILOVANOVIC, JOVAN N.;VASOJEVIC, MIORAD;GOJKOVIC, SVETISLAV, J. CHEM. SOC. PERKIN TRANS.,(1988) N 4, 533-535
作者:MILOVANOVIC, JOVAN N.、VASOJEVIC, MIORAD、GOJKOVIC, SVETISLAV
DOI:——
日期:——
ALEXAKIS A.; JACHIET D.; NORMANT J. F., TETRAHEDRON, 42,(1986) N 20, 5607-5619