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Ryu Sato Takehiko Goto Kazuo Kakuta Yuji Takikawa Saburo Takizawa Shigeru Oae 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3):289-294
Abstract α-Chlorotoluene (1) reacts with elemental sulfur in liquid ammonia affording dibenzyl disulfide (2), dibenzyl trisulfide (3), dibenzyl tetrasulfide (4), dibenzyl pentasulfide (5) and benzylidene benzylimide (6) at a low temperature such as 20°C. This reaction is presumed to be initiated by the nucleophilic attack of ammonium thioaminohydroxylate, “H2NS-NH4 +,” or dithioaminohydroxylate, “H2NSS-NH4,” formed upon treating elemental sulfur in liquid ammonia, on α-chlorotoluene (1). Benzylidene benzylimide (6) is presumed to be formed from benzylamine, which can be formed by treatment of α-chlorotoluene (1) with ammonia. 相似文献
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W. Kuchen D. Langsch W. Peters 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3-4)
Abstract Starting from tBu2PCl, the title compounds tBu2P(S)NHR′ (R′= Me Et, iPr, tBu) may be easily prepared according to With R′=tBu the amine has to be substituted by its Li-salt [tBuNH]?Li+. 相似文献
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E. I. Matrosov D. I. Lobanov N. V. Matrosova M. I. Kabachnik A. N. Nesmeyanov 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3-4)
Abstract The crystalline phosphoranes have been obtained. IR-, UV- and NMR spectra of phosphoranes (Ia,b) and their interaction products with nitrogen bases have been investigated. It was determined that phosphoranes have structure (I) with pentacoordinate phosphorus and phenolic hydroxy group, while their products of interactions with nitrogen bases have the ionic structure (II) with hexacoordinate phosphorus (II). The X-ray difraction approves the structure (I) for phosphorane Ib. 相似文献
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J. Skolimowski R. Skowronski M. Olomucki 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3-4)
Abstract Different unsaturated phosphonic acids of the general formula (R=C1, OCH3, OH, NMe2, C6H5; R′=C1, OCH3, H, NMe2) have been prepared starting from propargyl alcohol. Reaction of chlorophosphonic acids with 2-amino-pyridine yields phosphoramidates, which in the next step undergo a base-catalyzed cyclization by addition of the ring nitrogen across the unsaturated bond, leading to the unstable derivative 1. In the case of the allenic phosphonic acid in which R=R′=NMe2, the NH2 group of 2-aminopyridine adds first to the allenic system yielding an enamine, which on heating cyclizes to give a new phosphorus-nitrogen heterocyclic system 2. 相似文献