Conformational analysis. 45. Syn-axial methyl/phenyl and gauche methyl/methyl interactions
作者:Muthiah Manoharan、Ernest L. Eliel
DOI:10.1021/ja00314a021
日期:1984.1
l'equilibre conformationnel du phenyl-1 trimethyl-3,3, t-5 cyclohexane et du phenyl-1 trimethyl-1,3,3 cyclohexane par RMN de 13 C a basse temperature; evaluation de l'interaction diaxial-1,3 du phenyl et du methyl
Etude de l'equilibre conformationnel du phenyl-1 trimethyl-3,3, t-5 cyclohexan et du phenyl-1 trimethyl-1,3,3 cyclohex par RMN de 13 C a base temperature; 评价 de l'interaction diaxial-1,3 du phenyl et dumethyl
Synthesis of Cyclohexanones through a Catalytic Cationic Cyclization of Alkynols or Enynes
作者:Pedro Alonso、Raquel Fontaneda、Pilar Pardo、Francisco J. Fañanás、Félix Rodríguez
DOI:10.1021/acs.orglett.8b00437
日期:2018.3.16
A novel procedure for the synthesis of cyclohexanones from alkynol or enyne derivatives through a cationic cyclization has been developed. The key points to obtain the six-membered ring derivatives are the use of starting materials containing a terminal alkyne, the use of tetrafluoroboric acid as a promoter of the cationic cyclization, and the appropriate selection of 1,1,1,3,3,3-hexafluoropropan-2-ol
The 1,4-addition of organotitaniumatecomplexes to enones by nickel catalysis is reported. With a methyltitanium atecomplex good yields of conjugate addition to stericallyhinderedenones are achieved. Phenyltitanium atecomplexes react with less sterically encumbered enones to the 1,4-addition products in moderate to high yields.
A Pd(II)‐Functionalized Covalent Organic Framework for Catalytic Conjugate Additions of Arylboronic Acids to β,β‐Disubstituted Enones
作者:Patrick M. Heintz、Brian P. Schumacher、Minda Chen、Wenyu Huang、Levi M. Stanley
DOI:10.1002/cctc.201900894
日期:2019.9.5
A palladium(II)‐functionalized covalent organic framework (Pd@TpBpy COF) constructed from 1,3,5‐triformylphloroglucinol (Tp) and [2,2′‐bipyridine]‐5,5′‐diamine (Bpy) is reported as a recyclable catalyst for conjugate additions in aqueousmedia. Additions of an array of stereoelectronically diverse arylboronic acid nucleophiles to β,β‐disubstituted enones form a variety of ketones containing benzylic
Studies on the reduction of some substituted cyclohexanones
作者:M. Balasubramanian、A. D'Souza
DOI:10.1016/s0040-4020(01)96334-3
日期:1968.1
different cyclohexanones, with at least one Ph group at position 3, have been reduced by different methods and the stereochemical course of these reductions discussed 3,3,5-Trimethyl-5-phenyl-cyclohexanone (V) has been shown to exist in a non-chair conformation, probably in one or more of the flexible forms. Configurations have been assgined to the epimeric cyclohexanols obtained in the reductions.