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Arsoles

M2491). l-Chloro-3,4-dimethyl-2,5-bis(trimethylsilyl) arsole is reduced by calcium to give dimer 132. [Pg.140]

Phenylarsine with symmetric disubstituted diacetylenes ( -LiBu, benzene) forms arsoles 79 in 33-83% yield (68TL3257). [Pg.178]

Thus the synthesis of diheteroferrocenes depends on the availability of the corresponding heteroles, which have been prepared by just a few routes. l-Phenyl-2,5-disubstituted arsoles are prepared generally from the corresponding 1,3-diynes by the base-catalyzed addition of phenylarsine. In this manner, Markl and Hauptmann have prepared 1-phenyl-2,5-dimeth-ylarsole (25) in 30% yield.4 Subsequently, Mathey et al. used this arsole to prepare the first diarsaferrocene 26.5 (see Scheme 2.)... [Pg.327]

There is a good synthesis of the C-unsubstituted 1-phenylarsole (34). The reaction of dilithiophenylarsine with the readily available mixture of isomeric 1,4-dichloro- 1,3-butadienes (33) gives 34 in 25% yield.13 The arsole 34 is easily converted to 1,1 -diarsaferrocene (8), while 1,1 -diphos-phaferrocene (7) can be prepared analogously, as shown in Scheme 4. The lack of availability and low stability of phenylstibine and phenylbismuthine limit extension to preparation of the heavier diheteroferrocenes. [Pg.328]

Heterocycles with Arsenic, Antimony, and Bismuth. Arsoles, stilboles, and bismoles (Scheme 54) are five-membered heterocycles for which experimental data do not indicate aromatic properties, while semiempirical calculations (CNINDO or CNDO/ S) showed that the anions are aromatic. The chemistry and theoretical aspects in connection with their... [Pg.22]

Heating the phosphole 151 with 2,3-dimethyl-l,3-butadiene at 170 °C gave the bicyclic phosphorus heterocycle 153, presumably by way of the rearranged 2H-phosphole 152 (equation 84)74. The arsole 154 behaved analogously (equation 85)75. [Pg.511]

The planar bond configuration of the nitrogen atom in pyrrole is usually explained in terms of aromaticity. The pyramidalization of the phosphorus and arsenic atoms in phosphole (130) and arsole (131) was taken to be the consequence of their much lower aromaticity relative to pyrrole [75JCS(P2)974] (see Table VIII). [Pg.368]

Af-Unsubstituted 1,2,4-diazaarsoles are directly alkylated by diphenyl diazomethane, diazo esters, sulfur ylides, and alkyl vinyl ethers <90TL7607, 95HAC403). 1-Alkyl-1,2,4-diazo-arsoles (12) (R = Me, CHPhj) react with dimethylsulfoxonium yhde to give bicyclic arsiranes (13) (Equation (1))... [Pg.822]

Arsol One of the names for cyclotrimethylene-trinitrosamine (R-Salz, in Ger), described in this work under Cyclotrimethylenetriamine... [Pg.491]

Condensed Ring Systems containing an Arsole, Stibole or Bismole Ring 547... [Pg.539]

The only known example is hexahydro-lH-arsolo[l,2-a]arsole (17) (63JCS725). This unusual compound is prepared when the arsonium bromide (18) is heated to 200 °C (equation 6). Cyclization is accompanied by loss of methyl bromide to give (17 b.p. 100-102 °C/17 mmHg) which was characterized as the red palladium dibromide adduct (m.p. 150 °C). No analogous derivatives of antimony or bismuth have been reported. [Pg.542]

Five-membered Ring Systems containing Two Double Bonds 1.18.3,3.1 Arsoles, Stiboles, Bismoles... [Pg.544]

If a dichloroacetic acid salt is used as the alkyl halide to add to the lithioarsole (41), the arsole (45) is formed. This loses the elements of chlorine and carbon dioxide on heating, giving an intermediate carbene which gives ring expansion to the arsenin (46 equation 9) (74TL303). [Pg.545]

Pentaphenylstibole gives similar alkali metal derivatives to the arsoles but these have been studied in less depth than the arsoles (79MI11800). [Pg.545]


See other pages where Arsoles is mentioned: [Pg.73]    [Pg.335]    [Pg.517]    [Pg.518]    [Pg.518]    [Pg.518]    [Pg.138]    [Pg.146]    [Pg.147]    [Pg.41]    [Pg.104]    [Pg.118]    [Pg.98]    [Pg.19]    [Pg.906]    [Pg.342]    [Pg.369]    [Pg.823]    [Pg.335]    [Pg.728]    [Pg.473]    [Pg.696]    [Pg.539]    [Pg.539]    [Pg.539]    [Pg.544]    [Pg.544]    [Pg.544]    [Pg.545]    [Pg.545]    [Pg.545]    [Pg.546]   
See also in sourсe #XX -- [ Pg.122 ]

See also in sourсe #XX -- [ Pg.70 , Pg.276 ]

See also in sourсe #XX -- [ Pg.152 ]




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Arsole

Arsoles transition metal complexes

Arsoles, cycloaddition

Arsoles, synthesis

Diels-Alder reactions of arsoles

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