Cycloadditions of 3,4-dimethyl-1-thio-1-phenyl phosphole
作者:Y. Kashman、I. Wagenstein、A. Rudi
DOI:10.1016/0040-4020(76)87028-7
日期:1976.1
Phosphole sulfide 1 undergoes cycloaddition to give a new 15-phosphasteroid. The 13C-NMR and 2JPC-coupling constants of several compounds prepared similarly are discussed, permitting structure assignment to one of the 7-phosphabicyclo[2.2.1]heptane adduct 5. Thiophosgene reacts with the PS moiety of 1, giving 12 after hydrolysis, through a PS to PO transformation coupled in case of 1 with a proton
Organopalladium Complex Promoted Asymmetric Cycloaddition Reactions Involving 3,4-Dimethyl-1-phenylphosphole 1-Sulfide as the Heterocyclic Diene
作者:Ying Qin、Selvasothi Selvaratnam、Jagadese J. Vittal、Pak-Hing Leung
DOI:10.1021/om020682u
日期:2002.11.1
1-sulfide (DMPPS) reacted as a heterocyclicdiene in the asymmetric Diels−Alder reaction with diphenylvinylphosphine in the presence of an organopalladium(II) complex derived from the enantiomerically pure ortho-metalated (R)-(1-(dimethylamino)ethyl)naphthalene. The cycloaddition reaction proceeded at room temperature via an intramolecular mechanism in which the cyclic diene and the dienophile were coordinated
Preparation et proprietes de quelques sulfures de phospholes fonctionnels
作者:F. Mathey
DOI:10.1016/s0040-4020(01)97564-7
日期:1974.1
tBuLi with 1-phenyl 3,4-dimethyl phosphole sulfide 1 in THF, gives a mesomeric anion 4. With aldehydes and ketones, this anion leads to methyl-substituted phospholes (6 and 9), 2-substituted phospholes (8) or 2-substituted 3-methylene phosphol 4-enes (5 and 7). With CO2 and CH3COOEt a 2-phosphole carboxylic acid 11 and a 2-acetyl phosphole 10 are obtained, respectively. The spectra of the 2-substituted
t BuLi与1-苯基3,4-二甲基磷硫化物1在THF中的溶液生成介观阴离子4。与醛和酮一起,该阴离子产生甲基取代的磷脂(6和9),2-取代的磷脂(8)或2-取代的3-亚甲基磷酸4-烯(5和7)。用CO 2和CH 3 COOEt分别获得2-磷酰基羧酸11和2-乙酰基磷酰基10。对2-取代的磷脂的光谱进行了详细的研究。还描述了它们的一些化学性质(二聚,离解和叔丁基化)。
Derives α-carbonyles et “aromaticite” des phospholes trivalents
作者:F. Mathey
DOI:10.1016/0040-4020(76)87022-6
日期:1976.1
two-step synthesis of 2-acetyl and 2-carbethoxy-phospholes involves the metalation of monomeric 3,4-dimethyl phosphole sulfides by t-butyl-lithium followed by reaction with ethyl acetate and ethyl carbonate. The phosphole sulfides thus obtained are reduced by PBu3 or P(CH2CH2CN)3 to the phospholes 20–24. In the 2-acetyl-phosphole series, variable electron transfer from the dienic system and from the phosphorus
2-乙酰基和2-乙氧基-磷的两步合成涉及通过叔丁基锂将单体的3,4-二甲基磷硫化物金属化,然后与乙酸乙酯和碳酸乙酯反应。由此获得的磷杂环硫化物通过PBU降低3或P(CH 2 CH 2 CN)3至phospholes 20 - 24。在2-乙酰基-磷系列中,通过1 H和31 P NMR监测从二烯系和从磷原子到羰基的可变电子转移。2-羧基磷脂25的主要分解途径与吡咯和噻吩衍生物26和27形成鲜明对比的是,质谱仪中的P involvesC涉及PC环内键裂解和CO的损失。这些事实妨碍强2 p π -3 p π在磷杂核电子离域。
The coordination chemistry of phosphinidene sulfides. Synthesis and catalytic properties of Pd<sub>4</sub> and Pt<sub>4</sub> clusters
[M(PPh3)4] (M = Pd, Pt) yields star-like M4 clusters in which the central core is coated by three RP = S units acting as 4-electron μ2-P, η2-P = S ligands. The Pd cluster displays both stability and catalytic activity in the Suzuki–Miyaura reaction. DFT analysis suggests that a mononuclear [η2-RP = S]Pd(PPh3) complex is involved in the formation of the Pd4 clusters.