已开发了用于合成芳基酮的各种N-甲基-N-甲苯磺酰基酰胺与二芳基硼酸的改进的酰基交叉偶联。在大多数情况下,在3当量的存在下,通过使用1mol%的2,6-二异丙基苯基咪唑基亚甲基和3-氯吡啶共负载的氯化钯作为催化剂,可以以优异的产率获得芳基酮。在回流的THF中,以K 2 CO 3为碱。容易制备且具有成本效益的底物,N-甲基-N-甲苯磺酰胺和二芳基硼酸,以及可商购的催化剂体系,保证了实用和有效地获得芳基酮。
已开发了用于合成芳基酮的各种N-甲基-N-甲苯磺酰基酰胺与二芳基硼酸的改进的酰基交叉偶联。在大多数情况下,在3当量的存在下,通过使用1mol%的2,6-二异丙基苯基咪唑基亚甲基和3-氯吡啶共负载的氯化钯作为催化剂,可以以优异的产率获得芳基酮。在回流的THF中,以K 2 CO 3为碱。容易制备且具有成本效益的底物,N-甲基-N-甲苯磺酰胺和二芳基硼酸,以及可商购的催化剂体系,保证了实用和有效地获得芳基酮。
A general Pd-catalyzed Suzuki–Miyaura cross-coupling of N-mesylamides with arylboronicacids by selective N–C cleavage has been developed. The presented results represent the first example of a transition-metal-catalyzed cross-coupling of amides activated by an atom-economic, cheap, and benign mesyl group. The reaction delivers arylated products featuring a range of useful functional groups by chemoselective
Method for the production of alkyl aryl sulphonates
申请人:——
公开号:US20040030209A1
公开(公告)日:2004-02-12
The preparation of alkylaryl compounds takes place by
1) preparation of a mixture of, on statistical average, predominantly monobranched C
10-14
-olefins by
a) reaction of a C
4
-olefin mixture over a metathesis catalyst for the preparation of an olefin mixture comprising 2-pentene and/or 3-hexene, and optional removal of 2-pentene and/or 3-hexene, followed by dimerization of the resulting 2-pentene and/or 3-hexene over a dimerization catalyst to give a mixture comprising C
10-12
-olefins, and optionally removal of the C
10-12
-olefins, or
b) extraction of predominantly monobranched paraffins from kerosene cuts and subsequent dehydrogenation, or
c) Fischer-Tropsch synthesis of olefins or paraffins, where the paraffins are dehydrogenated, or
d) dimerization of shorter-chain internal olefins, or
e) isomerization of linear olefins or paraffins, where the isomerized paraffins are dehydrogenated,
2) reaction of the olefin mixture obtained in stage 1) with an aromatic hydrocarbon in the presence of an alkylation catalyst which contains zeolites of the faujasite type.
[EN] BIARYL ACYL-SULFONAMIDE COMPOUNDS AS SODIUM CHANNEL INHIBITORS<br/>[FR] COMPOSÉS D'ACYLSULFONAMIDE DE BIARYLE EN TANT QU'INHIBITEURS DES CANAUX SODIQUES
申请人:AMGEN INC
公开号:WO2015051043A1
公开(公告)日:2015-04-09
The present invention provides compounds of Formula (Ia), and pharmaceutically acceptable salts thereof. The compounds are useful as inhibitors of voltage-gated sodium channels, in particular Nav 1.7. (Ia); as described in the specification. The compounds are useful for the treatment of diseases treatable by inhibition of sodium channels such as pain disorders. Also provided are pharmaceutical compositions containing compounds of the present invention, as well as intermediates and processes useful for making the compounds.
The chemoselective cleavage of C–N bonds of amides, sulfonamides, and acylsulfonamides by aluminum halides is described. AlCl3 and AlI3 display complementary reactivities toward N-alkyl and N-acyl moieties. N-Alkylacylsulfonamides, secondary N-(tert-butyl)sulfonamides, and tertiary N-(tert-butyl)amides undergo N-dealkylation upon treatments with AlI3 generated in situ from aluminum and iodine in acetonitrile
The invention relates to a process for the preparation of alkylarylsulfonates by
a) reaction of a C
4
-olefin mixture over a metathesis catalyst for the preparation of an olefin mixture comprising 2-pentene and/or 3-hexene, and optional removal of 2-pentene and/or 3-hexene,
b) dimerization of the 2-pentene and/or 3-hexene obtained in stage a) over a dimerization catalyst to give a mixture containing C
10-12
-olefins, and optional removal of the C
10-12
-olefins,
c) reaction of the C
10-12
-olefin mixtures obtained in stage b) with an aromatic hydrocarbon in the presence of an alkylating catalyst to form alkylaromatic compounds, where, prior to the reaction, additional linear olefins may be added,
d) sulfonation of the alkylaromatic compounds obtained in stage c), and neutralization to give alkylarylsulfonates, where, prior to the sulfonation, linear alkylbenzenes may additionally be added,
e) optional mixing of the alkylarylsulfonates obtained in stage d) with linear alkylarylsulfonates.