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Enol ether formation by disproportionation of the 1,5-biradical intermediate in the photocyclization of o-isopropoxybenzophenone

✍ Scribed by Peter J. Wagner; Guy Laidig


Book ID
104225112
Publisher
Elsevier Science
Year
1991
Tongue
French
Weight
222 KB
Volume
32
Category
Article
ISSN
0040-4039

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## Abstract The __C__ methylation of the carbohydrate‐derived __O__‐chiral esters 5a‐d to derivatives 8 proceeds with (__R__) selection of 1:1 to 10:1 and depends primarily on the base used for enolate generation. Lithium 2,2,6,6‐tetramethylpiperide (LTMP) shows the highest and lithium hexamethyldi