Protonation and methylation of conformationally fixed 2-lithio-1,3-dithianes. Some reactions of remarkable stereoselectivity
β Scribed by Eliel, Ernest L.; Hartmann, Armando A.
- Book ID
- 126948522
- Publisher
- American Chemical Society
- Year
- 1971
- Tongue
- English
- Weight
- 277 KB
- Volume
- 93
- Category
- Article
- ISSN
- 0002-7863
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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
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