申请人:Sun Pharma Global FZE
公开号:EP2141156A1
公开(公告)日:2010-01-06
The present invention provides a process for preparation of 1-[3-(dimethylamino)propyl]-1-(4-fluorophenyl)-1,3-dihydro-5-isobenzofuran carbonitrile comprising reacting a compound of formula (Iva), in the presence of a base with a compound of formula RX, wherein R is selected from alkyl, alkenyl, aryl and heteroaryl which may be optionally substituted with electron withdrawing groups and X is selected from F, Cl, Br, I, CN, Otf and ORi, wherein Tf represents trifluoromethanesulfonyl group, and R1 is optionally substituted alkyl, Z is a cyano group or a group that may be converted to a cyano group; further wherein RX is selected such that an intermediate ether derivative, a compound of formula (Va) formed from said reaction cyclises to a compound of formula (VI), and where Z is not a cyano group, conversion of the group Z in the compound of formula (VI) to a cyano group to form 1-[3-(dimethylamino)propyl]-1-(4-fluorophenyl)-1,3-dihydro-5-isobenzofuran carbonitrile. The present invention also provides novel ether compound, a compound of formula (Va) and a process for preparation thereof.
本发明提供了一种制备1-[3-(二甲基氨基)丙基]-1-(4-氟苯基)-1,3-二氢-5-异苯并呋喃-碳腈的方法,包括在碱的存在下,将式(Iva)的化合物与式RX的化合物反应,其中R选择烷基,烯基,芳基和杂芳基,可以选择性地用电子吸引基取代,X选择F、Cl、Br、I、CN、Otf和ORi,其中Tf代表三氟甲烷磺酰基,R1是可选择性取代的烷基,Z是氰基或可转化为氰基的基团;进一步地,选择RX使反应形成的中间醚衍生物,即式(Va)的化合物环化成为式(VI)的化合物,且当Z不是氰基时,将式(VI)的基团Z转化为氰基,以形成1-[3-(二甲基氨基)丙基]-1-(4-氟苯基)-1,3-二氢-5-异苯并呋喃-碳腈。本发明还提供了新的醚化合物,即式(Va)的化合物及其制备方法。