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1- Methyl-2-triphenylstannyl

The Diels-Alder reaction has also been used to prepare special reagents. Thomas and coworkers80, for instance, studied the Diels-Alder reactions of methyl (E)- and (Z)-3-(triphenylstannyl)acrylates 72a and 72b with cyclopentadiene and converted the organostannanes obtained to tin hydrides. (E)-72a afforded endo 73 exclusively with 99% yield, whereas (Z)-72b afforded a 2 1 mixture of endo 74 and exo 75 with 77% overall yield (equation 24). Cycloadduct 73 was easily converted to tin hydride 76. By... [Pg.349]

The a-D-allofuranose derivative 284682, (Z)-2-methyl-3-triphenylstannyl-3-penten-l-ol (285)683, as well as a number of o-methoxyarylstannanes including the o-anisylstannyl compounds (286) provide examples of particularly strained four-membered rings. [Pg.1090]

A requirement for an a/m-orientation of the hydridic p-C—H and C—metal bonds as in [10] is indicated by the reaction of threo-3-deuterio-2-(trimethylstannyl)butane with triphenylcarbenium tetrafluoroborate in methylene chloride at 24° which yields a mixture of 3-deuterio-l -butene, /ra v-2-deuterio-2-butene, and undeuteriated c/.v-2-butene as the major product (Hannon and Traylor, 1981). Comparison of the product distributions for the protio- and deuterio-stannanes yields primary and secondary isotope effects of 3.7 and 1.1 respectively. These reactions appear to avoid the complications of adduct formation between the triarylcarbenium salt and the hydride donor, but the preferential formation of the cw-2-butenes is not fully explained. The requirement for the anti-orientation is also shown by the relatively low hydride-donating properties of tris[(triphenylstannyl)methyl-methane (Ducharme et ai, 1984a) which adopts a C3-conformation with the P-C—H gauche to all three C—Sn bonds. In contrast, 1,3,5-triphenyl-2,4,6-trithia-1,3,5-tristannyladamantane, in which anti-orientations with respect to the bridgehead C—H bond are locked, shows high reactivity (Ducharme et al., 1984b). [Pg.69]

Diphenyl-elhyl-phosphansulfid564 (Carboxymethyl)-diphenyl-phosphansulfidSM ( Diphenyl- (1 -triphenylstannyl-ethyl)-phosphansulfid5M (Bis- [diphenylphosphino]-methyl)-diphenyI-phosphansulfid571... [Pg.90]

Diphenyl-(1-phenyl-propyl)- E2, 147 Diphenyl-(2-phcnyl-vinyl)- E2, 66 Diphenyl-[2-(/ranv-2-phcnyl-vinyl)-phenyl)-aus Diphenyl-(2-phenyl-ethinyl)-phosphan und wasserhaltigem Ethanol E2, 48 Diphenyl-(phthalimino-methyl)- E2, 22 Diphenyl-piperidinomethyl- XII/1, 155 Diphenyl-1-propinyl- E2, 76 Diphenyl-tosyloxymethyl- El, 513 Diphenyl-(3-trialkylsik>xy-a]]yD- E2, 27 Diphenyl-trichlormethyl- XII/1, 151 F.2, 23 (Z)-Diphenyl-(3-triethylsilyloxy-allyl)- E2, 27 (Z)-Diphenyl-(3-triethylsilyloxy-2-butenyl)-aus Diphenyl-methoxy-phosphan und Chlor-triethyl-silan/3-Oxo-l-butcn E2, 27 Diphenyl-trifluoracctyl- E2, 8, 19, 42 Diphenyl-(2,2,2-lrifluor-ethyl)- E2, 16 Diphenyl-(l,l,3-trimethyl-2-butenyl)- E2, 71 Diphenyl-(trimethylsilyl-methyl)- E2, 22, 66 Diphcnyl-(l-trimethylsilyloxy-alkyl)- E2, 26 Diphenyl-triphenylmethyl-XlI/1,151 Diphenyl-(triphenylstannyl-methyl)-... [Pg.1013]

Triphenylstannylmethyllidlium, (C6Hs)3SnCH2Li (1). Mol. wt. 370.98. The reagent is obtained in almost quantitative yield from (triphenylstannyl)methyl iodide by halogen-metal exchange with n-butyllithium. ... [Pg.561]

Dimethyl-l-triphenylstannyl- 139 2-Ethoxycarbonyl-l -ethyl-1 -methyl- 1867 l-Ethyl-2-methylcuprato-l, 5.7-trimethyl- 127... [Pg.3524]

Pentacarbonyl-(trifluor-chlor-athyl)- 1428 Pentacarbonyl-[5-triphenylstannyl-tetrakis-[trifulor-methyl]-cyclobuten-(2)-yl - 1429... [Pg.752]

Syntheses of l,2 3,4-di-0-isopropylidene-6-0-3-(triphenylstannyl)propyl-a-D-galactopyranose and 1,6-anhydro-3,4-0-isopropylidene-2-C>-triphenylstannyl methyl-P-D-galactopyranose have been described as well as a family of [6-0-( 1,2 3,4-di-0-isopropylidene-a-D-galactopyranosyl)methyl]tin species Ph Sn-(CH20R)4 n (n = 1-3 ROH = l,2 3,4-di-0-isopropylidene-a-D-galacto-pyranose), and 1,2 3,4-di-0-isopropylidene-6-0- triphenylstannylmethyl - a- d -galactopyranose. ... [Pg.219]

Bipyridine-A, )his(triphenylstannyl)zinc, in Sn-00447 >Bis(acetato-0)dibutylstannane, see Sn-00248 >Bis(acetato-0)diethylplumbane, see Pb-00078 Bis(7V-acetyl-7V-methylhydroxylamino)dimethyltin, see Sn-00160 >Bis(acetyloxy)dibutylstannane, see Sn-00248 >Bis(acetyloxy)diethylplumbane, see Pb-00078 Bis(acetyloxy)diphenylplumbane, see Pb-00141 >l,3-Bis(acetyloxy)-l,l,3,3-tetrabutyldistannoxane, see Sn-00360 1,2-Bis(acetyloxy)-1,1,2,2-tetraphenyldistannane, Sn-00414 Bis(benzenesulfinato)diphenyllead, Pb-00181 Bis(benzenethiolato)lead, Pb-00116 Bis[bis(trimethylsilyl)methyl]germanium, Ge-00186 Bis[bis(trimethylsilyl)methyl]germylene, see Ge-00186 Bis [bis(trimethylsilyl)methyl] lead, Pb-00138 Bis[bis(trimethylsilyl)methyl]plumbylene, see Pb-00138 [Bis[bis(trimethylsilyl)methyl]plumbylene]pentacarbonylmol-ybdenum, Pb-00164... [Pg.137]

Triphenyl(triphenylplumbyl)germane, see Pb-00196 Triphenyl [(triphenylplumbyl)oxy]silane, Pb-00197 Triphenyl(triphenylplumbyl)tin, see Pb-00200 Triphenyl(triphenylsilyloxy)plumbane, see Pb-00197 Triphenyl (triphenylstannyl)lead, Pb-00200 Triphenyl [(triphenylstannyl)oxy]silane, see Sn-00439 Triphenyl [tris(trimethylsilyl)methyl]stannane, Sn-00419 T riphenylvinylplumbane, Pb-00171 Tripropylgermanium chloride, see Ge-00116 >Tripropyllead acetate, see Pb-00102 >Tripropyllead chloride, see Pb-00090 Tripropylstannane, Sn-00187 (1 -Tripropylstannyl)-1,3-butadiene, see Sn-00277 >Tripropyltin bromide, see Sn-00186... [Pg.152]

Inorganic Derivatives.- 1,6-Anhydro 2-chloro-2,4-dideoxy-4-(diphenylphosphoryl)-P-D-glucopyranose, the P-in-the-ring sugar analogues (27) and (28)," the natural arsenic-containing riboside (29), methyl 4,6-0-benzylidene-3-deoxy-3-C-triphenylstannyl-a-D-altropyranoside, two isomeric chromium(III) complexes with 1,3,5-triamino-1,3,5-trideoxy-cw-inositol in the one structure, the vanadium(in) complex (30),and the platinum(Il)-dithiocarbamate complex (31). ... [Pg.298]

Photonucleophilic aromatic substitution reactions of phenyl selenide and telluride with haloarenes have also been proven to involve the S jlAr mechanism, with the formation of anion radical intermediates. Another photonucleophihc substitution, cyanomethylation, proves the presence of radical cations in the reaction mechanism. Liu and Weiss have reported that hydroxy and cyano substitution competes with photo substitution of fluorinated anisoles in aqueous solutions, where cation and anion radical intermediates have been shown to be the key factors for the nucleophilic substitution type. Rossi et al. have proposed the S j lAr mechanism for photonucleophihc substitution of carbanions and naphthox-ides to halo anisoles and l-iodonaphthalene. > An anion radical intermediate photonucleophilic substitution mechanism has been shown for the reactions of triphenyl(methyl)stannyl anion with halo arenes in liquid ammonia. Trimethylstannyl anion has been found to be more reactive than triphenylstannyl anion in the photostimulated electron- transfer initiation step. [Pg.738]

See other pages where 1- Methyl-2-triphenylstannyl is mentioned: [Pg.3396]    [Pg.1092]    [Pg.65]    [Pg.1092]    [Pg.140]    [Pg.153]    [Pg.174]    [Pg.171]    [Pg.92]    [Pg.220]   
See also in sourсe #XX -- [ Pg.150 ]



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