申请人:SYNGENTA PARTICIPATIONS AG
公开号:US20140296527A1
公开(公告)日:2014-10-02
The present invention relates to processes for the enantio-selective preparation of spyrrolidine derivatives useful in the manufacture of pesticidally active compounds, as well as to intermediates in the processes. The processes include those comprising
(a-i) reacting a compound of formula Ia
wherein
P is alkyl, aryl or heteroaryl, each optionally substituted, wherein the heteroaryl is connected at P via a ring carbon atom;
R
1
is chlorodifluoromethyl or trifluoromethyl;
R
2
is aryl or heteroaryl, each optionally substituted;
with a source of cyanide in the presence a chiral catalyst to give a compound of formula IIa
wherein P, R
1
and R
2
are as defined for the compound of formula Ia; and
(a-ii) oxidising the compound of formula IIa with a peroxy acid, or peroxide in the presence of an acid to give a compound of formula VI
wherein R
1
and R
2
are as defined for the compound of formula Ia.
本发明涉及用于手性选择性制备spyrrolidine衍生物的过程,该衍生物在制造杀虫活性化合物方面有用,以及该过程中的中间体。该过程包括以下步骤:(a-i)将式Ia化合物与氰化物源在手性催化剂的存在下反应,其中式Ia化合物中,P为烷基、芳基或杂环芳基,每个可选地被取代,其中杂环芳基通过环碳原子连接到P;R1为氯二氟甲基或三氟甲基;R2为芳基或杂环芳基,每个可选地被取代,以给出式IIa化合物,其中P、R1和R2与式Ia化合物中的定义相同;以及(a-ii)在酸的存在下,将式IIa化合物与过氧酸或过氧化物氧化,以给出式VI化合物,其中R1和R2与式Ia化合物中的定义相同。