Synthesis of 1,2,3-Triazole-Substituted 3,7,7-Trimethylbicyclo[4.1.0]Heptanols Based on (+)-3-Carene
作者:S. N. Curlat、F. Z. Macaev
DOI:10.1007/s10600-021-03461-4
日期:2021.7
Regioisomeric 3,7,7-trimethylbicyclo[4.1.0]heptanols and their acetoacetates with substituted 1,2,3-triazole fragments were synthesized via azide–alkyne cycloaddition reactions of azidocaranols and mono-substituted acetylenes. A one-pot synthesis of symmetric and asymmetric esters of carane-type 2,6-dimethylpyridine-3,5-dicarboxylic acid was proposed.
Reduction of azides to amines and amides was carried out with NaBH4/CoCl2 · 6 H2O in sole water at 25 °C under catalytic heterogeneous conditions. A broad spectrum of azides was reduced in a short time, chemoselectively in high yield and purity.
将叠氮化物还原为胺和酰胺是在催化非均相条件下使用 NaBH4/CoCl2·6 H2O 在 25 °C 的单一水中进行的。广谱叠氮化物在短时间内被还原,化学选择性高产率和纯度。
Synthesis of new enantiopure trans-3,4-diaminocaranes from (+)-3-carene
A synthetic strategy to obtain new enantiopure trans-3,4-diaminocaranes derived from (+)-3-carene via a stereoselective methodology is described. The stereoselective preparation of 3,4-alpha-carene- or 3,4-beta-carene-epoxide is followed by a ring opening by sodium azide to obtain the azido-alcohols. Subsequent cyclization affords the corresponding aziridine diastereoisomers, which are converted to azido amines by opening of the aziridine rings by sodium azide and then reduced to the final diamine diastereoisomers. The absolute configurations of the final diamines and of novel intermediates are established by H-1 NMR spectra correlated with conformational analysis supported by molecular modeling. (C) 2011 Elsevier Ltd. All rights reserved.
Bakaleinik, G. A.; Shagidullin, Rif. R.; Shagidullin, R. R., Journal of general chemistry of the USSR, 1992, vol. 62, # 3.2, p. 539 - 543
作者:Bakaleinik, G. A.、Shagidullin, Rif. R.、Shagidullin, R. R.、Chernova, A. V.、Musin, R. Z.、Karlin, V. V.
DOI:——
日期:——
Ring Opening of Epoxides with Sodium Azide in Water. A Regioselective pH-Controlled Reaction