Benzyl-tert.-butyl

The anions derived from racemic alkyl and benzyl tert-butyl sulfoxides undergo 1,4-addition to a,/J-unsaturated esters to give adducts with high product diastereoselection (>5 1)10,11. Alkyl 4-methylphenyl sulfoxides were found to be less diastereoselective. In the case of 2-methyl-2-(methylsulfinyl)propanc the highly hindered 2,6-di-rer7-butyl-4-methylphenyl ester was required to prevent a competing acylation reaction. 

Secondary amines (dialkylamines, benzyl tert-butyl amines and cyclic amines) can be oxidized to the nitrones using hydrogen peroxide in the presence of catalysts like Na2W04... 

The same general method has been used by the submitters to prepare o-tolyl /erf-butyl ether, w-tolyl feri-butyl ether, benzyl tert-butyl ether, and -anisyl feri-butyl ether. 

Potassium Benzyl bromide Benzyl tert-butyl ether Potassium... 

Most recently, Monteiro et al. have reported that cyclopalladated compounds derived from the ortho-metalation of benzylic tert-butyl thioethers are excellent catalyst precursors for the Suzuki cross-coupling reaction of aryl bromides and chlorides with phenylboronic acid under mild reaction conditions. A broad range of substrates and functional groups are tolerated in this protocol, and high catalytic activity is attained (Eq. (58)) [93]. 

Benzyl-tert.-butyl- E16d, 734 (N — CHO — Spaltung), 900 (Imin-Red.)... 

The radical substitution at selenium is efficient when the leaving radical is stabilized (e.g. benzyl, tert-butyl). This reaction has been used for the preparation of selenium containing heterocycles [117]. In Eq. 50, the conversion of the Barton ester 156 to the tetrahydroselenophene derivative 157 is described [118, 119]. Mechanistic studies and ab initio calculations indicate that the substitution does not involve hypervalent selenium derivatives. 

Benzyl tert-butyl sulphone PhCH2S02-tert-Bu 90 376.6 AOP 1992ZHA/BOR... 

Benzyl butyl sulphoxide, Z 5.6, Z"8 Benzyl tert-butyl sulphoxide, Z 5.6 C11H16OS2... 

The Williamson ether synthesis involves treating a haloalkane with a metal alkoxide. Following are two reactions intended to give benzyl tert-butyl ether. One reaction gives the ether in good yield, the other does not. Which reaction gives the ether What is the product of the other reaction, and how do you account for its formation ... 

Protecting groups commonly employed for masking amino groups include alkyl carbamates such as benzyl-, tert-butyl-, and 9-fluorenylmethyl carbamates. If used for the... 

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