Disclosed herein is a method for preparing a coumarin compound of formula (F), in which R
1
, R
2
, and R
3
are independently H, C
1
˜C
7
alkoxy, C
1
˜C
7
alkyl, phenoxy, benzyloxy, or a halogen atom; R
4
is an alkyl group; and Ar is an optionally substituted aryl group,
the method including: treating a chromene compound having the following formula (E)
with an acid in the presence of water.
A chromene compound of formula (E) and a method for preparing the chromene compound of formula (E) are also disclosed.
本文揭示了一种制备
香豆素化合物的方法,其
化学式为(F),其中R1、R2和R3独立地为H、C1~C7烷
氧基、C1~C7烷基、
苯氧基、苄
氧基或卤素原子;R4为烷基;Ar为可选取代的芳基,该方法包括:在
水的存在下用酸处理具有以下
化学式(E)的咔喱
烯化合物。本文还揭示了一种
化学式(E)的咔喱
烯化合物及其制备方法。