申请人:Riggs Lewis Richard
公开号:US20070100135A1
公开(公告)日:2007-05-03
The present invention relates to a process for the preparation of furopyrroles of general formula (I), comprising (a) heating a compound of the formula (II) under microwave irradiation optionally in the presence of an inert solvent, wherein A
1
and A
2
are C
1
-C
18
alkyl, C
2
-C
18
alkenyl, C
2
-C
18
alkynyl, C
5
-C
8
cycloalkyl, C
5-
C
8
cycloalkenyl, aryl or heteroaryl, A
3
is hydrogen, C
1
-C
18
alkyl, cyanomethyl, Ar
3
, —CR
30
R
31
—(CH
2
)
m
—Ar
3
or Y—R
32
, wherein R
30
and R
31
independently of each other stand for hydrogen or C
1
-C
4
alkyl, or phenyl which can be substitute up to three times with C
1
-C
4
alkyl, Ar
3
stands for aryl, C
5
-C
8
cloalkyl, C
5
-C
8
cycloalkenyl or heteroaryl, which can be substituted one to three times with C
1
-C
9
alkyl, C
1
-C
8
alkoxy, halogen or phenyl, which can be substituted with C
1
-C
8
alkyI or C
1
-C
8
alkoxy one to three times, and m stands for 0, 1, 2, 3 or 4, R is C
1‘-C
18
alkyl, in particular C
1
-C
4
alkyl, aryl, in particular phenyl, or aralkyl, in particular benzyl, which can be substituted one to three times with C
1
-C
8
alkyl, C
1
-C
8
alkoxy, or halogen, Y is —C(O)—, —C(O)O—, —C(O)NH—, —SO
2
NH— or —SO
2
— and R
32
is C
1
-C
18
alkyl, Ar
3
, or aralkyl. The furopyrroles of the general formula (I) can be can be obtained in high yield and high purity by the process of the present invention.
本发明涉及一种制备一般式(I)的呋喃吡咯的过程,包括(a)在微波辐射下加热公式(II)的化合物,可选地在惰性溶剂的存在下,其中A1和A2为C1-C18烷基,C2-C18烯基,C2-C18炔基,C5-C8环烷基,C5-C8环烯基,芳基或杂环基,A3为氢,C1-C18烷基,氰甲基,Ar3,—CR30R31—(CH2)m—Ar3或Y—R32,其中R30和R31相互独立地代表氢或C1-C4烷基,或苯基,可以用C1-C4烷基取代最多三次,Ar3代表芳基,C5-C8环烷基,C5-C8环烯基或杂环基,可以用C1-C9烷基,C1-C8烷氧基,卤素或苯基取代一到三次,可以用C1-C8烷基或C1-C8烷氧基取代一到三次,m为0,1,2,3或4,R为C1'-C18烷基,特别是C1-C4烷基,芳基,特别是苯基,或芳基烷基,特别是苄基,可以用C1-C8烷基,C1-C8烷氧基或卤素取代一到三次,Y为—C(O)—,—C(O)O—,—C(O)NH—,—SO2NH—或—SO2—,R32为C1-C18烷基,Ar3或芳基烷基。通过本发明的方法可以高产高纯度得到一般式(I)的呋喃吡咯。