In tandem reactions, cyclopropylcarbinols are obtained from allyloxylithium or -magnesium intermediates, generated in situ by alkylation of conjugated aldehydes, ketones, and esters as well as from allyl carboxylates or vinyloxiranes. Using this methodology, numerous fragrance ingredients and their precursors were efficiently converted to the corresponding cyclopropylcarbinols.
A new synthesis of α-santalol (1) is described. 1-Benzyloxy-4-bromo-2-methyl-2-butene (6) was converted by the reaction with nickel carbonyl to the π-allylic nickel bromide complex (7), which reacted with (−)-π-bromotricyclene (8) to afford benzyl ether (2). The benzyl ether (2) was led to (1) (cis: trans=40: 60) by reductive cleavage of the benzyloxy group.
Julia,M.; Ward,P., Bulletin de la Societe Chimique de France, 1973, p. 3065 - 3067
作者:Julia,M.、Ward,P.
DOI:——
日期:——
Cannabinoid Receptor Type II Ligands from Sandalwood Oil and Synthetic α-Santalol Derivatives
作者:Pradeep Paudel、Pankaj Pandey、Jason J. Paris、Nicole M. Ashpole、Fakhri Mahdi、Jun-Mian Tian、Joseph Lee、Mei Wang、Min Xu、Amar G. Chittiboyina、Ikhlas A. Khan、Samir A. Ross、Xing-Cong Li
DOI:10.1021/acs.jnatprod.3c00282
日期:2023.7.28
as new chemotypes of cannabinoid receptor type II (CB2) ligands with Ki values of 10.49 and 8.19 μM, respectively. Nine structurally new α-santalol derivatives (4a–4h and 5) were synthesized to identify more selective and potent CB2 ligands. Compound 4e with a piperazine structural moiety demonstrated a Ki value of 0.99 μM against CB2 receptor and did not show binding activity against cannabinoid receptor