The lithium derivatives (I) of 1,3-dithianes, which have established their value as nucleophilic acylating agents, react with a variety of alkyl halides and carbonyl compounds.
Nucleophilic displacement of carbohydrate primary halides with lithio-1, 3-dithiane
β Scribed by A.M. Sepulchre; G. Vass; S.D. Gero
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- French
- Weight
- 129 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
the line-shape changes allow the detection of two different dynamic processes, which may be assigned to inhibited rotations about the partial C C and C N double bonds of the E-isomers (Scheme 2). Above ca. 0Β°C conversion into the isomer with Z-configurated CC double bond, which contains an intramol
H2S04 a t 0Β°C. Heating a drop in a test tube over a free flame leads to detonation; sensitivity to shock is notable only after admixture of a few grains of sand. Addition of bromine affords 2,3-dibromopropyl hydroperoxide (solvent: ether; Br2 added dropwise at 15 "C). The isomer, 2-bromo-1-bromometh
The unexpected formation of open-chain thioesters (3) and ( 6) from the reaction of 2-lithio-r-2-t-4-t-6-trimethyl (1-Li) and 2-lithio-r-2-phenyl-t-4-t-6-dimethyl-1,3-dithiane (4-Li), respectively, with chlorodiphenylphosphane followed by oxidation was observed instead of the anticipated gem-derivat
dithiane derivatives R 0490 21 -142 1,3-Dithienium and 1,3-Dithiolenium Salts. Part 9. Reactions of 1,3-Dithiane-2-ylium Tetrafluoroborates with C-Nucleophiles. -New geminal disubstituted 1,3-dithianes, e.g. (III), (V), and (VII), are obtained by the title reaction. These compounds are potential pre