NOVEL THIOPHENE COMPOUND AND PROCESS FOR PRODUCING CAFFENOFURAN OR ANALOGUE THEREOF FROM THE SAME
申请人:SAN-EI GEN F.F.I., INC.
公开号:EP1854791B1
公开(公告)日:2011-07-13
GORZYNSKI, M.;REWICKI, D., LIEBIGS ANN. CHEM., 1986, N 4, 625-637
作者:GORZYNSKI, M.、REWICKI, D.
DOI:——
日期:——
Novel Thiophene Compound and Process for Producing Caffenofuran or Analogue Thereof from the Same
申请人:Katsumura Shigeo
公开号:US20080167481A1
公开(公告)日:2008-07-10
The present invention provides a novel thiophene compound as a synthetic intermediate that is useful for efficient production of kahweofuran or an analogue thereof. The present invention also provides a process for producing kahweofuran or an analogue thereof using the novel thiophene compound as an intermediate material.
Of novel thiophene compounds represented by Formula (1):
wherein R
1
is a hydrogen atom or a C
1
-C
4
lower alkyl group; R
2
is a hydrogen atom or an alcohol-protecting group; R
3
is a hydrogen atom, —COR
4
or —C(OH)R
5
(wherein R
4
and R
5
each represent a C
1
-C
4
lower alkyl group); provided that when R
2
and R
3
are hydrogen atoms, R
1
is not any of a hydrogen atom, methyl group, or n-propyl group; a thiophene compound represented by Formula (2) is reduced and cyclized in the presence of a transition metal catalyst to produce kahweofuran or kahweofuran analogue (3
a
) shown below:
wherein R
1
is a hydrogen atom or a C
1
-C
4
lower alkyl group, and R
4
is a C
1
-C
4
lower alkyl group.
US7897790B2
申请人:——
公开号:US7897790B2
公开(公告)日:2011-03-01
Gorzynsky, Marek; Rewicki, Dieter, Liebigs Annalen der Chemie, 1986, # 4, p. 625 - 637