Vinyl esters as effective acetaldehyde surrogates in [4 + 1] cycloaddition based multicomponent cascade
作者:Manoj Kumar、Sourav Bagchi、Anuj Sharma
DOI:10.1039/c5ra10073a
日期:——
A new multicomponent cascade has been designed by utilizing vinyl esters as effective acetaldehyde surrogate. While most of the cyclic α-ketoenols underwent a facile three component conversion to annulated furans, phenols such as naphthol and sesamol got simply acylated under the same reaction conditions. This microwave assisted method provides clean access to a wide range of functionalised furans
Aggregation‐inducedemission/aggregation‐inducedemissionenhancement (AIE/AIEE) has recently attracted intense research, and a large number of AIE/AIEE luminogens (AIE/AIEEgens) have been constructed for application in diverse scientific fields. The AIE and AIEE effects have similar, but not identical, photophysical behaviors, which are closely related to molecular architectures. However, the current
4-alkylated 1,4-dihydropyridines (1,4-DHPs). By using terminal olefin as the C4 source of the 1,4-DHP skeleton, this synthetic strategy provides a series of 1,4-DHPs through a 1,1-difunctionalization/cyclization process. In this protocol, two C(sp3)−C(sp2) bonds and a C(sp2)−N bond are simultaneously formed, the hydrogen source on the newly formedmethylgroup of the 1,4-DHP skeleton is confirmed and a possible
Carbon transfer reactions of functionalized oxazolidines and their open chain enamine tautomers to enamine nucleophiles. A facile synthesis of substituted pyridines and ring annulated derivatives
作者:Kamaljit Singh、Jasbir Singh、Harjit Singh
DOI:10.1016/s0040-4020(97)10349-0
日期:1998.1
Oxazolidines substituted at C-2 with -CH2-EW(-CO-, etc.) and capable of existing as ring-chain (enamine) tautomers' react with cyclic, acyclic and heterocyclic enamine derivatives in a 1:1 stoichiometric manner to provide a versatile synthesis of substituted pyridines and their ring annulated derivatives. (C) 1997 Elsevier Science Ltd. All rights reserved.
Nadaraj; Kalaivani; Selvi, S. Thamarai, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2007, vol. 46, # 10, p. 1703 - 1706