申请人:Goehring Wolfgang
公开号:US20050014792A1
公开(公告)日:2005-01-20
The present invention relates to a process for the manufacture of compounds of formula
wherein the substituents are as described herein which comprises the steps of
a) reacting a compound of formula
with a compound of formula
to form a compound of formula
b) converting the OH/═O function of compounds of formula XIV/XIVa into a leaving group P with a reagent containing a leaving group, selected from POCl
3
, PBr
3
, MeI and (F
3
CSO
2
)
2
O to form a compound of formula
wherein P is halogen or trifluoromethanesulfonate;
c) substituting R
2
for the leaving group P by reacting compound XV with HR
2
to form a compound of formula
and
d) hydrolyzing the nitrile function in an acidic medium selected from H
2
SO
4
, HCl and acetic acid, to form a compound of formula I
The compounds of formula I are valuable intermediates for the manufacture of therapeutically active compounds which have NK-1 antagonist activity.
本发明涉及一种制备具有以下公式的化合物的方法,其中取代基如本文所述,包括以下步骤:a)将具有以下公式的化合物与具有以下公式的化合物反应,形成具有以下公式的化合物b)将具有以下公式的化合物的OH/═O功能转化为含有离去基的试剂,所述离去基选自POCl3、PBr3、MeI和(F3CSO2)2O,形成具有以下公式的化合物,其中P为卤素或三氟甲烷磺酸盐;c)通过将化合物XV与HR2反应,用R2替代离去基P,形成具有以下公式的化合物;d)在从H2SO4、HCl和乙酸中选择的酸性介质中水解腈功能,形成具有以下公式的化合物I。公式I的化合物是制备具有NK-1拮抗活性的治疗活性化合物的有价值的中间体。