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Chemistry ylids

A. W. Johnson, Ylid Chemistry, Academic Press, New York, 1979. [Pg.296]

An extensive chemistry is developing of dinuclear gold(III) complexes with phosphorus ylid ligands (Figure 4.41). As mentioned in section 4.19, gold(I) compounds can undergo one- or two-electron oxidative additions,... [Pg.318]

For a review of nitrogen ylids, see Musker, W.K. Fortschr. Chem. Forsch., 1970,14, 295. For a monograph on sulfur ylids, see Trost, B.M. Melvin Jr, L.S. Sulfur Ylids Academic Press NY, 1975. For reviews, see Fava, A. in Bemardi Csizmadia Mangini Organic Sulfur Chemistry Elsevier NY, 1985, p. 299 Belkin, Yu.V. Polezhaeva, N.A. Russ. Chem. Rev., 1981, 50,481 Block, E. in Stirling The Chemistry of the Sulphonium Group,... [Pg.81]

Transformation of [4- F]fluorobenzaldehydes into [4- F]fluorophenyl-alkenes using the Wittig reaction has been relatively unexplored. Examples are shown in Scheme 35. It requires the in situ generation of the ylid [171] by reaction of the phosphonium bromide with propylenoxide [172]. These conditions, successfully used in carbon-11 chemistry [173], have however the drawback of leading to a mixture of Z and E stereoisomers. [Pg.232]

Johnson, A. W. Ylid chemistry. New York and London Academic Press 1966 Bestmann, H., Zimmermann, R. Fortschr. chem. Forsch. 20, 1 (1971). [Pg.145]

For a monograph, see Johnson Ylid Chemistry, Academic Press New York. 1966. For reviews, sec Morris. Surv. Prog. Chem. 1983, 10, 189-257 Hudson Chem. Br. 1971, 7, 287-294 Lowe Chem. Ind. (London) 1970, 1070-1079. For a review on the formation of ylides from the reaction of carbenes and carbenoids with heteroatom lone pairs, see Padwa Hornbuckle Chem. Rev. 1991, 91, 263-309. [Pg.39]

I. Zugravescu and M. Petrovanu, A -Ylid Chemistry. McGraw-Hill, New York, 1976. [Pg.10]

WITTIG, GEORGE (1897-1987). A University of Heidelberg professor who won the Nobel prize for chemistry in 1979 along with Herbert C. Brown of Purdue. Wittig s research showed that phosphorous ylids react with ketones and aldehydes to form alkenes. This reaction is used a great deal in the synthesis of pharmaceuticals and other complex organic substances. [Pg.1750]

L Zugravescu, M. Petrovanu, N-Ylid Chemistry, McGraw-Hill, New York (1976), Chpt 2 (review) Comprehensive Organic Synthesis, Eds. B. M. Trost and I. Fleming, Pergamon, Oxford (1991), Vol 3, Part 3.10, p 913 (review)... [Pg.812]

To date, reverse cyclative cleavage with C-C bond formation has relied on ylid chemistry. A single example was reported54 of the intramolecular Wittig condensation of an immobilized amide to give a two-substituted indole (Fig. 18). Macrocyclization through an immobilized... [Pg.430]

A small number of cyclopropylids are known in the literature (13, 14,) but their coordination chemistry has not been developed. For a detailed study of the effect of the cyclopropyl ring on the donor properties of ylids a series of simple species was prepared in the pure, salt-free state and characterized by multiple-resonance experiments (14, 15). [Pg.30]

Allylic phosphonium ylids have long had a valued place In the synthesis of 1,3-dienes, and similarly a-heterosubstituted ylids have been used in the preparation of vinyl derivatives ( 1). This paper is concerned with the preparation and ylid chemistry of a series of a-alkoxyallylic phosphorus derivatives which possess both the structural features alluded to above. [Pg.145]

This is particularly so with a-heterosubstituted derivatives, as shown by a number of recent examples in which oxide derived ylids have been found to give vinyl derivatives in circumstances where the corresponding phosphonate derived ylids do not (2-5). It was therefore decided to prepare the parent (unsubstituted) a-methoxy-allyl phosphorus compounds 1, 2 and 3, in order to investigate their Wittig-type chemistry. [Pg.145]

But how are we to make the epoxide 61 The obvious route is by epoxidation of the alkene 63. The alkene 63 could be made by a Wittig reaction (chapter 15) on the ketone 64 or directly by sulfur ylid chemistry (chapter 30). [Pg.41]

PhLi gave the ylid from 55 and the Wittig reaction with 54 did indeed give Z-52. These days we should probably use catalytic OSO4 for the dihydroxylation but his mixtures [1. AgOAc, I2, HOAc, H2O, 2. KOH, EtOH] also gave the diol 51 and TsCl in pyridine gave the bis tosylate 50. This chemistry is explained in the workbook. [Pg.171]

Three techniques have been utilized to promote generation of an azomethine ylid from bis(trimethylsilmethyl)amines photochemistry, chemistry with silver fluoride and electrochemistry. [Pg.330]

Trost, B. M. Melvin, L. S., Jr. In Sulfur Ylides-, Academic Press New York, 1975. Johnson, A. W. In Ylide Chemistry, Academic Press New York, 1966. Zugravescu, I. Petrovanu, M. In N-Ylid Chemistry, McGraw-Hill New York,... [Pg.153]


See other pages where Chemistry ylids is mentioned: [Pg.159]    [Pg.719]    [Pg.81]    [Pg.1287]    [Pg.182]    [Pg.153]    [Pg.103]    [Pg.143]    [Pg.502]    [Pg.54]    [Pg.62]    [Pg.156]    [Pg.6]    [Pg.44]    [Pg.237]    [Pg.159]    [Pg.29]    [Pg.463]    [Pg.234]    [Pg.328]    [Pg.8]   
See also in sourсe #XX -- [ Pg.45 , Pg.151 ]

See also in sourсe #XX -- [ Pg.45 , Pg.151 ]

See also in sourсe #XX -- [ Pg.45 , Pg.151 ]

See also in sourсe #XX -- [ Pg.45 , Pg.151 ]

See also in sourсe #XX -- [ Pg.45 , Pg.151 ]




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