[EN] PREPARATION OF CATIONIC AND NEUTRAL FUSED N-HETEROCYCLES WITH OR WITHOUT ADDITIONAL HETEROATOMS [FR] PRÉPARATION DE N-HÉTÉROCYCLES FUSIONNÉS CATIONIQUES ET NEUTRES AVEC OU SANS HÉTÉROATOMES SUPPLÉMENTAIRES
[Pt2(μ-SAz)(μ-S)]2+ (SAz = azolium thiolate) dication as an unusual source for quadruply bridging sulfide in [Ag2Pt2(μ-SAz)(μ4-S)]3+
作者:Jingqiu Li、Fuwei Li、Lip Lin Koh、T. S. Andy Hor
DOI:10.1039/b917404d
日期:——
Functionalisation of the Pt2(μ-S)2} core of [Pt2(μ-S)2(PPh3)4] by imidazolium, benzimidazolium and thiazolium salts results in a series of cationic complexes with mixed-bridging ligands of azolium thiolate and sulfide. The complex [Pt2(μ-S)(μ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]2 reacts readily with Ag(OTf) (OTf = triflate) to give [Pt2(μ-SAg2CF3SO4H2)(μ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]3. X-ray crystallographic analysis was carried out on [Pt2(μ-S)(μ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]2, [Pt2(μ-S)(μ-S(CH2)3C7H5NS)(PPh3)4][PF6]2, [Pt2(μ-S)(μ-SCH2CH2C3H3N2CH3)(dppy)4][PF6]2, [Pt2(μ-S)(μ-SCH2CH2C3H3N2CH3)(dppf)4][PF6]2, [Pt2(μ-SAg2CF3SO4H2)(μ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]3 and [Pt2(μ-SCH3)(μ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]3. The complex [Pt2(μ-SAg2CF3SO4H2)(μ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]3 reveals an unusual quadruply bridging sulfide, whose presence demonstrates an unexpected ability for the unsubstituted sulfide in the [Pt2(SR)(S)] core to capture silver moieties.
咪唑盐、苯并咪唑盐和噻唑盐对[Pt2(δ-S)2(PPh3)4]的Pt2(¼-S)2}核心进行官能化处理,产生了一系列具有硫代偶氮鎓和硫化物混合桥接配体的阳离子配合物。复合物 [Pt2(δ-S)(δ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]2很容易与 Ag(OTf)(OTf = 三氟酸盐)发生反应,生成 [Pt2(δ-SAg2CF3SO4H2)(δ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]3。对[Pt2(δ-S)(δ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]2、[Pt2(δ-S)(δ-S(CH2)3C7H5NS)(PPh3)4][PF6]2、[Pt2(δ-S)(δ-SCH2CH2C3H3N2CH3)(dppy)4][PF6]2 进行了 X 射线晶体学分析、[Pt2(μ-S)(μ-SCH2CH2C3H3N2CH3)(dppf)4][PF6]2, [Pt2(μ-SAg2CF3SO4H2)(μ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]3 and [Pt2(μ-SCH3)(μ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]3.复合物[Pt2(δ-SAg2CF3SO4H2)(δ-SCH2CH2C3H3N2CH3)(PPh3)4][PF6]3揭示了一种不寻常的四桥硫化物,它的存在表明[Pt2(SR)(S)]核心中的未取代硫化物具有意想不到的捕获银分子的能力。
A convenient quaternization/rearrangement procedure for conversion of thiazoles to medium- and large-sized N,S-heterocycles
A straightforward, two-step sequence capable of converting simple thiazoles into different sets of ring-expanded N,S-heterocycles of various sizes has been developed. The initial quaternizations of the heterocyclic moieties conducted with alpha,omega-dihaloalkanes (chain lengths from 2 to 8) in a 1:5 stoichiometry, afford the monoquaternary intermediates in isolated yields ranging from 16-71% (benzothiazole series, 9) to 17-93% (thiazole series, 10), respectively. In the subsequent OH-induced rearrangement, an expeditious ring-opening/ring-closure event incorporates the previously attached alkyl side chain in the newly formed hetero ring. Here the yields of benzannelated products 11 lie in the interval from 39 to 82%, while the monocyclic counterparts 12 fall within 11 to 59%, which in an overall perspective makes this methodology preparatively significant for an array of new compounds up to (at least) 12-membered ring sizes.
[EN] PREPARATION OF CATIONIC AND NEUTRAL FUSED N-HETEROCYCLES WITH OR WITHOUT ADDITIONAL HETEROATOMS<br/>[FR] PRÉPARATION DE N-HÉTÉROCYCLES FUSIONNÉS CATIONIQUES ET NEUTRES AVEC OU SANS HÉTÉROATOMES SUPPLÉMENTAIRES
申请人:NAT UNIV SINGAPORE
公开号:WO2021162633A1
公开(公告)日:2021-08-19
Disclosed herein is a process for the manufacture of a cationic fused N-heterocyclic ring system, comprising reaction of a compound of formula (I): with a base and with a material FF or only with a base to provide a compound of formula (II): where the symbols are defined herein.