Anions 4, derived from u-methoxyallylphosphine oxides 3, react with electrophiles in a highly regioselective fashion to give products of u-attack or y-attack depending upon the substitution pattern of the ylid 4 and the nature of the electrophile. \_ This elimination normally requires replacement o
The reactions of α-alkoxyallylphosphine oxide ylides with silicon, sulphur, and phosphorus electrophiles
✍ Scribed by Dipak K. Deychand; Alistair W. Hurray; Elizabeth Smeaton
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- French
- Weight
- 211 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
Anions (2), derived from a-methoxyallylphosphine oxides (l), react with silicon, sulphur and phosphorus electrophiles in a highly regioselective fashion t0
give the products of y-attack.
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During the course of our investigation of the synthesis of oic-triasoles by reacting a-keto-and a-ester phosphorus ylides with acyl asides and ethyl asidoformate (1 + 2 + z), we found that the N-l substituted triasoles,isomerised to the N-2 substituted triasoles (1 + A) under the basic reaction cond
Wittig reagents 2 react with furfiurylidenemalonitrile (la) und thienylidenemalonitrile (Ib) to give a mixture of products (6 and 7). Compound l b reacts with dialkyl phosphites (3) and trialkyl phosphites (4) to give the phosphonate 1:l adducts 9 and 12, respectively. Structures of the new products