Stereoselective synthesis of benzofuran and benzothiophene substituted dihydropyran derivatives via ring closing metathesis
摘要:
Ring closing metathesis reactions have been applied to diene and enyne systems derived from homoallylic alcohol backbones are described. The key intermediates 2-benzofuranyl la and 2-benzothiophenyl lb substituted homoallylic alcohols were synthesized from their corresponding carboxaldehyde derivatives. Racemic 2-heteroaryl-substituted homoallylic alcohols are successfully resolved to give the corresponding enantiopure acetates and alcohols with 80-99% ee through enzymatic resolution by various lipases. Enantiomerically enriched diene and enyne skeletons derived from homoallylic alcohols were subjected to the ring closing metathesis via first and second generation Grubbs' catalysts and the corresponding chiral heteroaryl-substituted dihydropyran derivatives were obtained with good yields (41-96%). (C) 2016 Elsevier Ltd. All rights reserved.
Synthesis and biological evaluation of α,β-unsaturated lactones as potent immunosuppressive agents
作者:Sun-Mi Lee、Won-Gil Lee、Young-Chul Kim、Hyojin Ko
DOI:10.1016/j.bmcl.2011.08.020
日期:2011.10
Compounds having α,β-unsaturatedlactones display a variety of biological activities. Many research groups have tested both natural and unnatural α,β-unsaturatedlactones for as-yet undiscovered biological properties. We synthesized α,β-unsaturatedlactones with various substituents at the δ-position and studied their immunosuppressive effects, that is, the inhibition of Interleukin-2 (IL-2) production
Design, stereoselective synthesis and computational calculations of novel hybrid compounds via Pauson-Khand reactions
作者:Selçuk Gümüş、Nezir Aslan、Nalan Nuriye Büyükadalı、Ayşegül Gümüş
DOI:10.1016/j.tetasy.2017.02.014
日期:2017.3
A series of novel chiral hybrid compounds between benzofuran and bicyclic cyclopentenone and also benzothiophene and bicyclic cyclopentenone have been designed and synthesized. Chiral enynes derived from enantiomerically enriched homoallyl and homopropargyl alcohols were converted into bicyclic cyclopentenone structures by intramolecular Pauson-Khand reactions. This strategy provides a facile access to various bicyclic cyclopentenones substituted with benzofuran or benzothiophene ring systems in good yields. In addition to the experimental work, the ground state geometries of the hybrid compounds were optimized using Density Functional Theory applications at the B3LYP/6-31G(d,p) level in order to obtain information about the 3D geometries and electronic structure. (C) 2017 Elsevier Ltd. All rights reserved.
Mozhaeva, L.V.; Shabanova, S.V.; Kazennova, N.B., Journal of Organic Chemistry USSR (English Translation), 1984, vol. 20, p. 766 - 769
MOZHAEVA, L. V.;SHABANOVA, S. KAZENNOVA, N. B.;ANISIMOV, A. V.;VIKTOROVA,+, ZH. ORGAN. XIMII, 1984, 20, N 4, 842-845
作者:MOZHAEVA, L. V.、SHABANOVA, S. KAZENNOVA, N. B.、ANISIMOV, A. V.、VIKTOROVA,+
DOI:——
日期:——
Stereoselective synthesis of benzofuran and benzothiophene substituted dihydropyran derivatives via ring closing metathesis
作者:Nalan Nuriye Büyükadalı、Nezir Aslan、Selçuk Gümüş、Ayşegül Gümüş
DOI:10.1016/j.tetasy.2016.08.005
日期:2016.10
Ring closing metathesis reactions have been applied to diene and enyne systems derived from homoallylic alcohol backbones are described. The key intermediates 2-benzofuranyl la and 2-benzothiophenyl lb substituted homoallylic alcohols were synthesized from their corresponding carboxaldehyde derivatives. Racemic 2-heteroaryl-substituted homoallylic alcohols are successfully resolved to give the corresponding enantiopure acetates and alcohols with 80-99% ee through enzymatic resolution by various lipases. Enantiomerically enriched diene and enyne skeletons derived from homoallylic alcohols were subjected to the ring closing metathesis via first and second generation Grubbs' catalysts and the corresponding chiral heteroaryl-substituted dihydropyran derivatives were obtained with good yields (41-96%). (C) 2016 Elsevier Ltd. All rights reserved.