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    • 5. 发明授权
    • Process for preparation of citalopram and enantiomers
    • 西酞普兰和对映异构体的制备方法
    • US07790935B2
    • 2010-09-07
    • US11660742
    • 2005-08-12
    • Periyandi NagarajanKilaru SrinivasuThennati Rajamannar
    • Periyandi NagarajanKilaru SrinivasuThennati Rajamannar
    • C07C41/09
    • C07C255/59C07D307/87
    • 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 OR1, 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 cyclizes 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-异苯并呋喃腈的方法,包括使式Ⅳa化合物在 具有式RX化合物的碱,其中R选自烷基,烯基,芳基和杂芳基,其可任选被吸电子基团取代,X选自F,Cl,Br,I,CN,OTf和OR1,其中 Tf表示三氟甲磺酰基,R 1是任选取代的烷基,Z是氰基或可以转化成氰基的基团; 进一步地,其中选择RX,使得中间体醚衍生物,由所述反应形成的式Va的化合物与式VI的化合物环化,并且其中Z不是氰基,其中式VI化合物中的基团Z的转化为 形成1- [3-(二甲基氨基)丙基] -1-(4-氟苯基)-1,3-二氢-5-异苯并呋喃腈的氰基。 本发明还提供了新颖的醚化合物,式Va的化合物及其制备方法。
    • 9. 发明授权
    • Process for preparation of citalopram and enantiomers
    • 西酞普兰和对映异构体的制备方法
    • US07989645B2
    • 2011-08-02
    • US12024492
    • 2008-02-01
    • Periyandi NagarajanKilaru SrinivasuThennati Rajamannar
    • Periyandi NagarajanKilaru SrinivasuThennati Rajamannar
    • C07D307/87
    • C07D307/87
    • The present invention provides a process for preparation of 1-[3-(dimethylamino)propyl]-1-(4-fluorophenyl)-1,3-dihydro-5-isobenzofuran car-bonitrile 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 OR1, 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 cyclizes 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-异苯并呋喃羧腈的方法,包括使式Ⅳa化合物在 存在碱与式RX化合物反应,其中R选自烷基,烯基,芳基和杂芳基,其可任选被吸电子基团取代,X选自F,Cl,Br,I,CN,OTf和OR1 其中Tf表示三氟甲磺酰基,R 1为任选取代的烷基,Z为氰基或可转化为氰基的基团; 进一步地,其中选择RX,使得中间体醚衍生物,由所述反应形成的式Va的化合物与式VI的化合物环化,并且其中Z不是氰基,其中式VI化合物中的基团Z的转化为 形成1- [3-(二甲基氨基)丙基] -1-(4-氟苯基)-1,3-二氢-5-异苯并呋喃腈的氰基。 本发明还提供了新颖的醚化合物,式Va的化合物及其制备方法。
    • 10. 发明授权
    • Process for preparation of citalopram and enantiomers
    • 西酞普兰和对映异构体的制备方法
    • US07964742B2
    • 2011-06-21
    • US12813256
    • 2010-06-10
    • Periyandi NagarajanKilaru SrinivasuThennati Rajamannar
    • Periyandi NagarajanKilaru SrinivasuThennati Rajamannar
    • C07D307/84
    • C07C255/59C07D307/87
    • 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 OR1, 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 cyclizes 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-异苯并呋喃腈的方法,包括使式Ⅳa化合物在 具有式RX化合物的碱,其中R选自烷基,烯基,芳基和杂芳基,其可任选被吸电子基团取代,X选自F,Cl,Br,I,CN,OTf和OR1,其中 Tf表示三氟甲磺酰基,R 1是任选取代的烷基,Z是氰基或可以转化成氰基的基团; 进一步地,其中选择RX,使得中间体醚衍生物,由所述反应形成的式Va的化合物与式VI的化合物环化,并且其中Z不是氰基,其中式VI化合物中的基团Z的转化为 形成1- [3-(二甲基氨基)丙基] -1-(4-氟苯基)-1,3-二氢-5-异苯并呋喃腈的氰基。 本发明还提供了新颖的醚化合物,式Va的化合物及其制备方法。