Convenient preparation of sterically hindered selones
โ Scribed by Guziec, Frank S.; Moustakis, Christine A.
- Book ID
- 127226126
- Publisher
- American Chemical Society
- Year
- 1984
- Tongue
- English
- Weight
- 450 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0022-3263
No coin nor oath required. For personal study only.
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The photoisomerization yields of a homologous series of o,o,o',o'substituted azobenzenes have been determined by excitation of the low lying l(n,~\*) and the higher lying I(~F,~F\*) states. For more severe steric hindrance, i.e. with substituents more bulky than methyl, the E + 2 quantum yields are
While methylation of lithium cyclopropylcarbenoids is easy, their reaction with electrophilic cyclopentadienes causes serious problems. Cyclopentenone can be reacted with lithium cyclopropylcarbenoids bearing groups X of low steric requirement. G.