## Abstract For Abstract see ChemInform Abstract in Full Text.
Aluminium-mediated [4+1] cyclization reaction: novel synthesis of 2,2,5,5-tetramethylcyclopentanecarboxylic acid
β Scribed by G. Bhaskar Reddy; Takeshi Hanamoto; Tamejiro Hiyama
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- French
- Weight
- 254 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0040-4039
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## Abstract 5β[4,5β^13^C~2~]β and 5β[1,5β^13^C~2~]Aminolevulinic acid (ALA) have been synthesized by the Gabriel condensation of potassium phthalimide with ethyl bromo[1,2β^13^C~2~]acetate (derived from [1,2β^13^C~2~]acetic acid) or ethyl bromo[2β^13^C]βacetate (derived from sodium [2β^13^C]acetate
We have described' the novel acid-catelysed (CH2C12-H2S04) CyCliSatiOn of the intermediate (Ia) to the B-norsteroid derivative (IIa). We now report the unusual reaction of the intermediate (lb), under similar conditions.