申请人:——
公开号:US20020107412A1
公开(公告)日:2002-08-08
The invention relates to a process for the preparation of cis-6-hexadecenoic acid of the formula I,
1
which comprises reacting
a
1
) a triphenylphosphonium salt of the formula II,
R
1
OOC—(CH
2
)
5
-P(R
2
)
3
+X
−
II
with decanal of the formula III
H
3
C—(CH
2
)
8
—CH═O III
or
a
2
) a triphenylphosphonium salt of the formula IV,
H
3
C—(CH
2
)
9
-P(R
2
)
3
+X
−
IV
with an aldehyde of the formula V,
R
1
OOC—(CH
2
)
4
—CH═O V
in a Wittig reaction, and
b) saponifying the ester, formed by process step a
1
) or a
2
), of the formula VI,
2
where the substituents R
1
, R
2
and X
−
have the meanings given in the description.
本发明涉及一种制备式I的顺式-6-十六碳烯酸的方法,其中包括反应a1)式II的三苯基膦酸盐,R1OOC—(CH2)5-P(R2)3+X−II与式III的癸醛,H3C—(CH2)8—CH═O III或a2)式IV的三苯基膦酸盐,H3C—(CH2)9-P(R2)3+X−IV与式V的醛,R1OOC—(CH2)4—CH═O V在维特格反应中,以及b)皂化由过程步骤a1)或a2)形成的酯的式VI,其中取代基R1,R2和X−具有所述描述中给出的含义。