A selective synthesis of both trans- and cis- p-mentha-1,8-dien-5-ol from trans-verbenol is described. The sequence leading to trans-p-mentha-1,8-dien-5-ol consists of cleavage of the cyclobutane ring of pinene with N-bromosuccinimide in acetone to give the acetonide of 6-bromo-trans-p-menthene-5,8-diol, hydrodebromination with lithium aluminum hydride. and acidic treatment of the resultant acetonide of trans-p-menthene-5,8-diol. cis-p-Mentha-1,8-dien-5-ol is obtained by Swern oxidation of the trans-isomer and reduction of the resultant ketone with lithium tri-sec-butylborohydride. Acidic treatment of the acetonide of cis-p-menthene-5,8-diol (obtained from cis-verbenol) gives exclusively p-mentha-1(7),2-dien-8-ol.
independent total syntheses of the Aristotelia alkaloid (−)-serratenone ((−)-1) are disclosed, one starting with (−)-α-pinene, the other one with (S)-α-terpineol. These correlations led to a revision of the originally proposed absolute configuration of the natural product. In the course of systematic investigations of the behavior of the indole alkaloids (+)-makomakine ((+)-18) and (−)-hobartine ((−)-22)
3-Methyl-6-(prop-1-en-2-yl)cyclohex-3-ene-1,2-diol: the Importance of Functional Groups for Antiparkinsonian Activity
作者:Oleg Ardashov、Alla Pavlova、Dina Korchagina、Konstantin Volcho、Tat’ yana Tolstikova、Nariman Salakhutdinov
DOI:10.2174/1573406411309050013
日期:2013.6.1
Compounds with different sets of three of the four functional groups of (1R,2R,6S)-3-methyl-6-(prop-1-en-2- yl)cyclohex-3-ene-1,2-diol 1 possessing high antiparkinsonian activity were synthesized. The synthesized compounds were tested for the antiparkinsonian activity in vivo on a mouse model with MPTP neurotoxin. A pronounced antiparkinsonian effect of 1 can only be achieved if it contains all the