Abstract Various functionalized benzopyran derivatives have been synthesized in good yields by a sequence of reactions viz. intramolecular cyclization of nitrile oxides, reductive cleavage, and acetylation.
                                    摘要 通过一系列反应合成了各种功能化的苯并
吡喃衍
生物,收率良好。腈氧化物的分子内环化、还原裂解和乙酰化。