1,2-dimagnesium derivatives of cyclopropane
β Scribed by J.W.F.L. Seetz; O.S. Akkerman; F. Bickelhaupt
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- French
- Weight
- 209 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
cis-1,2-Dibromomagnesiocyclopropane (cis-f) was isolated from the reaction Of both trams-and cis-1,2_dibromocyclopropane
(A) with magnesium. The corresponding dialkylmag nesium species (I), an oligomer of 2-magnesabicyclobutae, was obtained from cis-4 by precipitation in THF; it forms a soluble complex 8 with MgBr2.
In 1960, Wiberg and Bartley' reacted trans-1,2_dibromocyclopropane (trans-2) with magnesium and observed, on treatment of the reaction mixture with CO2 or D20, the formation of 2 and 2,
π SIMILAR VOLUMES
Conformationally constrained bis(glycines) as trans derivatives of cyclopropane have been prepared in stereoselective syntheses. (S)-4-Benzyl-2-oxazolidinone was used as a chiral auxiliary, trisyl azide was the electrophilic source of amine nitrogen. Four stereogenic centers were created. A related
Stereoselective Synthesis of Cyclopropane-1,2-bis(glycine) Derivatives. -The synthesis of the title compounds (VII) and (VIII) is achieved via stereoselective azidation of the trans-cyclopropane derivative (III). Interestingly, under similar conditions the cis-isomer (IX) reacts differently yieldin
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