A new synthesis of highly functionalized 2H-pyran derivatives
摘要:
Ethyl oxo-(2-oxo-cycloalkyl)-ethanoates undergo a smooth reaction with triphenylphosphine and dialkyl acetylenedicarboxylates via intramolecular Wittig reaction to produce spiro-cyclobutene derivatives. These spiro systems undergo electrocyclic ring opening reaction to produce electron-deficient 1,3-dienes, which spontaneously cyclize to 2H-pyran derivatives. (C) 2003 Elsevier Science Ltd. All rights reserved.
A new synthesis of highly functionalized 2H-pyran derivatives
摘要:
Ethyl oxo-(2-oxo-cycloalkyl)-ethanoates undergo a smooth reaction with triphenylphosphine and dialkyl acetylenedicarboxylates via intramolecular Wittig reaction to produce spiro-cyclobutene derivatives. These spiro systems undergo electrocyclic ring opening reaction to produce electron-deficient 1,3-dienes, which spontaneously cyclize to 2H-pyran derivatives. (C) 2003 Elsevier Science Ltd. All rights reserved.
A new synthesis of highly functionalized 2H-pyran derivatives
作者:Issa Yavari、Mohammad Bayat
DOI:10.1016/s0040-4020(03)00114-5
日期:2003.3
Ethyl oxo-(2-oxo-cycloalkyl)-ethanoates undergo a smooth reaction with triphenylphosphine and dialkyl acetylenedicarboxylates via intramolecular Wittig reaction to produce spiro-cyclobutene derivatives. These spiro systems undergo electrocyclic ring opening reaction to produce electron-deficient 1,3-dienes, which spontaneously cyclize to 2H-pyran derivatives. (C) 2003 Elsevier Science Ltd. All rights reserved.