Allylation reactions of acylsilanes as synthetic equivalents of aldehydes. Application to a stereocontrolled synthesis of (1S,2S,5S)-(10S)-and-(10R)-allyl myrtanol
β Scribed by Bianca Flavia Bonini; Mauro Comes-Franchini; Mariafrancesca Fochi; Germana Mazzanti; Cristiano Nanni; Alfredo Ricci
- Book ID
- 104259787
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- French
- Weight
- 230 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The allylation of acylsilanes with tetraallyltin in the presence of catalytic amounts of Sc(OTI) 3 proceeded smoothly to afford the silylated homoallylic alcohols in good yields. Subsequent protiodesilylation gave the formal adducts of the corresponding aldehydes. The homochiral acylsilane II gave a reversal of as) mmetric induction in the Sc(OTf) 3 catalyzed allylation and in the Sakurai reaction.
π SIMILAR VOLUMES
A novel chiral synthetic equivalent of dimethyl acetylenedicarboxylate, dimethyl (R)S-2-(10-isobornylsulfinyl)maleate (3), was synthesized. Diels-Alder reaction of (3) with cyclopentadiene proceeded with high stereoand diastereo-selectivity to afford the cycloadduct (4) almost exclusively, which has
## Abstmct: 2-(Tr~mcthylsilylmethyNio~~~tI~yltb~o)~t~~yle~~e-i~3-it~an~i~e(l~, readily prepared by reaction of 2-bis(mrrhylrlldo)~~ti:y&ne-~,3-inda~udi~~9) with trirnethylsilylf~t~~yl~~rcaptat~e(l~~, was sltown to be the synthetic equivalent of alkylldene-thiocarbonyl ytide. Treutment of this compor