本发明涉及一种制备式为以下式子的化合物的方法,其中取代基如下所述,包括以下步骤:
a) 反应式为以下式子的化合物与式为以下式子的化合物,形成式为以下式子的化合物;
b) 使用含有离去基的试剂将式为XIV/XIVa的化合物的OH/═O功能转化为离去基P,所选的离去基试剂为POCl3、PBr3、MeI和(F3CSO2)2O,形成式为以下式子的化合物,其中P为卤素或三氟甲烷磺酸盐;
c) 通过反应化合物XV与HR2,将取代基R2代替离去基P,形成式为以下式子的化合物;
d) 在选择的酸性介质H2SO4、HCl和乙酸中水解腈基,形成式为以下式子的化合物I;
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。
PROCESS FOR PREPARATION OF 4-ARYL-NICOTINAMIDE DERIVATIVES
申请人:F. HOFFMANN-LA ROCHE AG
公开号:EP1656351A1
公开(公告)日:2006-05-17
US7288658B2
申请人:——
公开号:US7288658B2
公开(公告)日:2007-10-30
[EN] PROCESS FOR PREPARATION OF 4-ARYL-NICOTINAMIDE DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DERIVES DE 4-ARYL-NICOTINAMIDE
申请人:HOFFMANN LA ROCHE
公开号:WO2005014549A1
公开(公告)日:2005-02-17
The present invention relates to a process for the manufacture of compounds of general formula wherein the substituents are as described in claim I characterized in that it comprises the steps of a) reacting a compound of formula (X), with a compound of formula (Xiii), to a compound of formula (XIVa), (XIV),b) converting the OH/=O function of compounds of formula XIV/XlVa into a leaving group P with a reagent containing a leaving group, selected from the group comprising POCl3, PBr3, Mel or (F3CS02)2O to form a compound of formula (XV), wherein P is halogen or trifluoromethanesulfonate, c) substituting the leaving group P by R2 with HR2 to form a compound of formula (XVI) d) hydrolyzing the nitrile function in an acidic medium comprising H2SO4, HCI or acetic acid, to a compound of formula (I)The compouds of formula I are valuable intermediate for the manufacture of therapeutically active compounds which have NK- I antagonist activity.
Process for preparation of pyridine derivatives
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.