A Novel Synthesis of Branched High-molecular-weight (C<sub>40</sub><sup>+</sup>) Long-chain Alkanes
作者:Hans-Joachim LEHMLER、Robert G. BERGOSH、Mark S. MEIER、Robert M. K. CARLSON
DOI:10.1271/bbb.66.523
日期:2002.1
(C40+) alkanes with various mid-chain alkylation patterns. Above C40, these alkanes are exceedingly difficult to separate and purify, and syntheses can be blocked by the low solubility of intermediates. To overcome these problems, a facile three-step synthesis employing the alkylation of 1,3-dithiane with a suitable alpha,omega-dibromoalkane was developed. Bisalkylation of the bis(dithianyl)alkane intermediate
Studies on the synthesis of linear aliphatic compounds. Part 2. The realisation of a strategy for repeated molecular doubling.
作者:Eva Igner、Oliver I. Paynter、Derek J. Simmonds、Mark C. Whiting
DOI:10.1039/p19870002447
日期:——
starting-materials, obtainable free from near homologues, to compounds of doubled chain length have been explored as approaches to the synthesis of n-paraffins and of terminally mono- or bi-functional derivatives. Acetylene alkylation routes lead to problems with protecting groups, but the use of the Wittig reaction provides a method of moleculardoubling convenient for repeated use, with the formation of chain-lengths