Synthesis and antidepressant-like effects of new 5-epi-incensole and 5-epi- incensole acetate in chronic unpredictable mild stress model of depression; behavioural and biochemical correlates
5- epi -Incensole: synthesis, X-ray crystal structure and absolute configuration by means of ECD and VCD studies in solution and solid state
作者:Satya Kumar Avula、Hidayat Hussain、René Csuk、Sven Sommerwerk、Phil Liebing、Marcin Górecki、Gennaro Pescitelli、Ahmed Al-Rawahi、Najeeb Ur Rehman、Ivan R. Green、Ahmed Al-Harrasi
DOI:10.1016/j.tetasy.2016.07.007
日期:2016.10
Incensole 1 and its acetate 2, found in incense, demonstrate interesting biological activities. Incensole acetate 2 was prepared on a large scale by employing the Paul and Jauch protocol from the crude extracts of Boswellia papyrifera Hochst. 5-epi-Incensole 3, obtained as colorless crystals, was prepared from incensole acetate via three steps; deacetylation, oxidation and reduction. The structure of 5-epi-incensole 3 was elucidated by means of spectroscopic data analysis, and the absolute configuration was established by single crystal X-ray analysis in combination with electronic and vibrational circular dichroism. In particular, the applicability of the solid-state ECD/TDDFT protocol to a compound with only two non-conjugated alkene chromophores was verified. (C) 2016 Elsevier Ltd. All rights reserved.