Synthesis and analgesic activity of alkyl-substituted octahydro-2H-chromenols
作者:I. V. Il’ina、D. V. Korchagina、E. A. Morozova、T. G. Tolstikova、K. P. Volcho、N. F. Salakhutdinov
DOI:10.1007/s11172-022-3677-x
日期:2022.11
A series of new compounds with hydrogenated 2H-chromene framework was synthesized starting from aliphatic aldehydes and available p-menthane monoterpenoid (−)-isopulegol in the presence of montmorillonite K10. These compounds were formed as a pair of diastereoisomers, which were isolated individually using column chromatography. Some of the compounds obtained were found to exhibit high analgesic activity in in vivo tests.
(R)-Citronellal undergoes initial ene reaction followed by Prins cyclization with aldehydes in the presence of 5 mol % of scandium triflate at ambient temperature to furnish octahydro-2H-chromen-4-ols in good yields and with high cis-selectivity. The use of scandium triflate makes this procedure simple, more convenient, and practical. (C) 2010 Elsevier Ltd. All rights reserved.