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Allylic germanes

The allylic germanes and stannanes obtained are useful synthons. The hydrogermylation of acetylenes can also be performed with dimethyl(2-thiophenyl)germane58. This compound can be prepared quantitatively by the Grignard reaction of Cl2GeMe2 with 2-bromothiophene (Scheme 8). [Pg.459]

Palladium-catalyzed germylation of allylic halides with germylstannanes also afforded allylic germanes [11]. [Pg.594]

Hydrogermylation of allene was effected by means of Pd catalyst to afford allylic germanes in good yields (Scheme 11.29) [48]. [Pg.604]

Related Sc(OTf)3-catalyzed allylation of aldehydes with allyl-tributyltin in nitromethane, allylation of aldehydes with allyl-germanes, allylation of acylsilanes, and intramolecular allenylation of propargyl silanes have also been reported. The allylation of aldehydes with tetraallyltin proceeds smoothly in micellar systems without using any organic solvents. Novel allylation of aldehydes with alkeneylepoxides is catalyzed by Sc(OTf)3 to produce 5-hydroxy-a, 8-unsaturated aldehydes. ... [Pg.390]

A considerable body of highly useful chemistry based on nickel has been developed, largely by the German chemist, G. Wilke. Many of these reactions involve what are called 77-propenyl (vr-allyl) complexes and their formation... [Pg.1521]

Table 9 Regioselectivities in the Photo-Oxygenation of Allylic Silanes, Alkenes, and Germanes... Table 9 Regioselectivities in the Photo-Oxygenation of Allylic Silanes, Alkenes, and Germanes...
The effects of the cr—JT interaction on the ground-state properties of allyltrimethylmetal compounds are paralleled by the effect on reactivity towards electrophilic reagents. Mayr demonstrated that allyltrialkylsilanes, allyltrialkyl-germanes, and trialkylstannanes react with diphenylcarbenium ions at rates 105,5.6 x 105, and 109, respectively, relative to propene.158 The reaction rates were also found to be sensitive to the inductive effects of the other substituents attached to the metal. A theoretical evaluation of the factors determining the regiochemistry and stereochemistry of electrophilic addition to allylsilanes and other allyl systems is reported by Hehre et al.159 They predict a preference for electrophilic attack anti with respect to the silane substituent, a prediction that is supported by many experimental studies.82,160... [Pg.180]

Fig. 14.46. Preparation of an allyl aryl ether and subsequent Claisen rearrangement. (The rearrangement is named after the German chemist Ludwig Claisen. Basically, the name is pronounced the German way but it is known that the family preferred the pronunciation /klaezn/.)... Fig. 14.46. Preparation of an allyl aryl ether and subsequent Claisen rearrangement. (The rearrangement is named after the German chemist Ludwig Claisen. Basically, the name is pronounced the German way but it is known that the family preferred the pronunciation /klaezn/.)...
SYNS ACQUINITE ACRALDEHYDE ACROLEINA (ITALIAN) ACROLEINE pUTCH, FRENCH) ACRYLALDEHYD (GERMAN) ACRYLALDEHYDE ACRYLIC ALDEHYDE AKROLEIN (CZECH) AKROLEINA (POLISH) ALDEHYDE ACRYLIQUE (FRENCH) ALDEIDE ACRILICA (ITALIAN) ALLYL ALDEHYDE AQUAUNE BIOCIDE CROLEAN ETHYLENE ALDEHYDE MAGNACIDE H NSC-8819 ... [Pg.25]

SYNS ALCOOL ALLILCO (ITALIAN) ALCOOL ALLYLIQUE (FRENCH) ALLILOWY ALKOHOL (POLISH) ALLYL AL ALLYLALKOHOL (GERMAN)... [Pg.36]

SYNS ALLILE (CLORURO di) (ITALIAN) ALLYLCHLORID (GERMAN) D ALLYLE (CHLORURE d ) (FRENCH) CHLORALLYLENE CHLOROALLYLENE 3-CHLOROPRENE 1-CHLORO PROPENE-2 1-CHLORO-2-PROPENE 3-CHLOROPROPENE O 3-CHLORO-l-PROPENE a-CHLOROPROPYLENE 3-CHLOROPROPYLENE 3-CHLORO-l-PROPYLENE 3-CHLORPROPEN (GERMAN) NCI-C04615 2-PROPENYL CHLORIDE... [Pg.38]

ALLYLSENFOEL (GERMAN) ALLYL SEVENOLUM ALLYL THIOCARBONIMIDE ARTIFICIAL MUSTARD OIL CARBOSPOL FEMA No. 2034 ISOTHIOCYANATE d ALLYLE (FRENCH) 3-ISOTHIOCYANA-TO-I-PROPENE MUSTARD OIL NCI-C50464 OIL OF iWSTARD, artificial OLEUM SINAPIS VOLATILE 2-PROPENYLISOTHIO-CYANATE REDSKIN SENF OEL (GERMAN) SYNTHETIC MUSTARD OIL VOLATILE OIL OF MUSTARD... [Pg.42]

SYNS 3-CHLOR-2-METHYL-PROP-1-EN (GERMAN) Y-CHLOROISOBL TYLENE 3-CHLORO-2-METHYL-1-PROPENE CHLORURE de METHALLYLE (FRENCH) 3-CLORO-2-METIL-PROP-1-ENE (ITALIAN) CLORURO di METALLILE (ITALIAN) ISOBUTENYL CHLORIDE METHALLYL CHLORIDE a-METHALLYL CHLORIDE 2-METHYL-ALLYLCHLORID (GERMAN) p-METHYLALLYL CHLORIDE 2-METHYLALLYL CHLORIDE METHYL ALLYL CHLORIDE (DOT) NCI-C54820... [Pg.338]

ALLYLSENFOEL (GERMAN) see AGJ250 ALLYL SEVENOLUM see AGJ250 ALLYL THIOCARBONIMIDE see AGJ250 ALLYL TRICHLORIDE see TJB600 ALLYL TRICHLOROSILANE see AGU250 ALLYLTRICHLOROSILANE, stabilized (DOT) see AGU250... [Pg.1502]

RCHO to a ketone RCOR (for other methods, see 10-71, 16-82, and 18-9). In this procedure the normal mode of reaction of a carbonyl carbon is reversed. The C atom of an aldehyde molecule is normally electrophilic and is attacked by nucleophiles (Chapter 16), but by conversion to the protected cyanohydrin this carbon atom has been induced to perform as a nucleophile. The German word Umpolung is used to describe this kind of reversal (another example is found in 10-71). Since the ion 166 serves as a substitute for the unavailable R— C=0 anion, it is often called a masked R( C=0) ion. This method fads for formaldehyde (R = H), but other masked formaldehydes have proved successful. In an interesting variation of nitrile alkylation, a quaternary bromide [PhC(Br)(Me)CN] reacted with allyl bromide, in the presence of a Grignard reagent, to give the alkylated product [PhC(CN)(Me)CH2CH=CH2]. ... [Pg.634]

The Barbier reactions involving germanium derivatives are similar in many ways to those noted in the previous section. The work of Pannell [79] and collaborators also produced fran.s-l-trimethylsilyl-3- / -allyl(triphenyl)germane in a 50% yield. [Pg.419]

One of the earliest chemical studies on garlic was conducted in 1844 by the German chemist Theodor Wertheim. Wertheim was interested in garlic and employed steam distillation to produce small amounts of garlic oil. Redistillation of the oil yielded some odoriferous volatile substances. Wertheim proposed the name allyl (from... [Pg.215]

Allyl Alcohol and Glycerol. These two products are treated together since both involve the chlorination of propylene to allyl chloride. The Shell allyl alcohol process is described by Fairbairn, Cheney, and Cherniavsky (30). This same process and the glycerol process are described by Williams (125). The German counterpart of these... [Pg.373]

See other pages where Allylic germanes is mentioned: [Pg.712]    [Pg.775]    [Pg.712]    [Pg.775]    [Pg.217]    [Pg.408]    [Pg.32]    [Pg.1575]    [Pg.47]    [Pg.266]    [Pg.180]    [Pg.106]    [Pg.37]    [Pg.160]    [Pg.74]    [Pg.239]    [Pg.383]    [Pg.40]    [Pg.429]    [Pg.1617]    [Pg.1637]    [Pg.420]    [Pg.363]    [Pg.383]    [Pg.91]    [Pg.91]    [Pg.111]    [Pg.6]    [Pg.560]    [Pg.216]    [Pg.376]   
See also in sourсe #XX -- [ Pg.604 ]



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