摘要:
The present invention relates to a process for the preparation of bisdihaloalkyl pyrazoles of formula (V) starting from diketones and acylhalides reacted with a Lewis acid, and a subsequent reaction with a substituted hydrazine.
摘要:
The invention relates to a process for the preparation of compound of formula (I) wherein R 1 is halogen and R 2 is halogen or hydrogen; comprising a) reacting the compound of formula (II) in an aprotic organic solvent in the presence of an aprotic polar co-solvent with a magnesium amide base followed by a halogenating agent, to the compound of formula I wherein R 1 is halogen and R 2 is hydrogen, and b) reacting the compound of formula (I), wherein R 1 is chloro and R 2 is hydrogen, in an aprotic organic solvent in the presence of an aprotic polar co-solvent with a magnesium amide base followed by a halogenating agent to a compound of formula I, wherein R 1 is chloro and R 2 is halogen.
摘要:
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 intermedates in the processes. The processes include those comprising (a-i) reacting a compound of formula (Ia), 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, 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), formula (VI), wherein R 1 and R 2 are as defined for the compound of formula (Ia).
摘要:
The present invention relates to a process for the preparation of a compound of formula (I) wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are as defined in the specification.
摘要:
The invention relates to a a process for the preparation of a compound of formula I comprising a) reacting a compound of formula II in the presence of magnesium or an organometallic reagent of formula III R 1 M 2 X (III), wherein R 1 is C I -C 4 alkyl; M 2 is Li or Mg and X is halogen or absent; with a compound of formula IV CF 3 -C(O)-R 2 (IV), wherein R 2 is halogen, hydroxyl, C I -C 4 alkoxy, (di-C I -C 4 alkyl)amino, OC(O)CF 3 , phenoxy or OM 1 ; wherein M 1 is Lithium, Magnesium, Sodium or Potassium; to a compound of formula V, and b) reacting the compound of formula V with alkali metal fluoride in the presence of catalytic amounts of a phase transfer catalyst in the presence of a polar solvent to the compound of formula I.
摘要:
The present invention relates to processes for the preparation of substituted cycloserine compounds of formula (I) wherein R 1 is C 1 -C 8 alkyl, C 1 -C 8 haloalkyl, C 3 -C 6 cycloalkyl,aryl or aryl substituted by one to five R 11 , or aryl-C 1 -C 4 alkylene or aryl-C 1 -C 4 alkylene substituted by one to five R 11 ; and each R 11 is independently C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, C 1 -C 4 alkoxy, C 1 -C 4 haloalkoxy, cyano or halogen; The invention also relates to intermediates produced by the processes. Compounds of formula (I) are useful intermediates for the production of compounds in the agricultural and pharmaceutical fields.
摘要:
The present invention provides stereoselective processes for the preparation of compounds of formula (I) wherein P is phenyl, naphthyl, a 6-membered heteroaryl group containing one or two nitrogen atoms as ring members, or a 10-membered bicyclic heteroaryl group containing one or two nitrogen atoms as ring members, and wherein the phenyl, naphthyl and heteroaryl groups are optionally substituted; R 1 is chlorodifluoromethyl or trifluoromethyl; R 2 is optionally substituted aryl or optionally substituted heteroaryl; n is 0 or 1; including the process comprising (a-i) reacting a compound of formula II wherein P, R 1 and R 2 are as defined for the compound of formula I; with nitromethane in the presence a chiral catalyst to give a compound of formula III Wherein P, R 1 and R 2 are as defined for the compound of formula I; and (a-ii) reductively cyclising the compound of formula III to give the compound of formula I. The invention also provides intermediates useful for processes for the synthesis of compounds of formula (I).
摘要:
The present invention provides, inter alia, a process for producing a compound of Formula (I): wherein A 1 , R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are as defined herein. The present invention further provides intermediate compounds utilised in said process, and methods for producing said intermediate compounds.
摘要:
The present invention relates to a process for the preparation of a compound of formula I (I), comprising reacting a compound of formula II (II), with a brominating agent in the presence of an acidic catalyst to a compound of formula III (III), and reacting the compound of formula III in tetrahydrofuran or 2-methyl-tetrahydrofuran with potassium tert-butoxide to a compound of formula I.
摘要:
The present invention provides a novel and improved process for the production of the production of hindered anilines containing perfluoroalky groups in good yield any by using close to stoichiometric amounts of acylating agent.