A substituted benzene derivative is prepared in a process, which includes
reacting a furan derivative of formula (I):
wherein R is an alkyl group,
with an olefin of formula (II):
R
1
—CH═CH—R
2
(II)
wherein R
1
and R
2
are the same or different and independently are selected from the group consisting of hydrogen, —CN, —CHO and —COOR
3
, wherein R
3
is selected from hydrogen or an alkyl group, or R
1
and R
2
together form a —C(O)—O—(O)C— group, with the proviso that R
1
and R
2
are not both hydrogen,
to produce a bicyclic ether; and dehydrating the bicyclic ether to obtain a benzene derivative. The benzene derivative thus obtained can suitably be converted to a benzene carboxylic acid compound by oxidation.
一种取代苯衍
生物的制备方法,包括将式(I)的
呋喃衍
生物与式(II)的烯烃反应:其中R为烷基,R1和R2相同或不同,且独立地选择自氢、—CN、—CHO和—COOR3的群组,其中R3选择自氢或烷基,或者R1和R2共同形成—C(O)—O—(O)C—基团,但是R1和R2不能同时为氢,以产生一个二
环醚;并脱
水这个二
环醚以获得苯衍
生物。因此获得的苯衍
生物可以适当地通过氧化转化为
苯甲酸化合物。