## Abstract Benzotriazolides 1 of alkanoic acids with one hydrogen atom in α‐position to the carboxamide group can be deprotonated with lithium diisopropylamide or lithium hexamethyldisilazanide to amide enolates 2 which condense at −90 to −95°C with ketones or aldehydes 3 to afford benzotriazolide
A synthesis of γ-lactones by reaction of lithium β-lithiopropionate with aldehydes and ketones
✍ Scribed by Drury Caine; A.Stephen Frobese
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- French
- Weight
- 199 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
Several synthons of b-carboxy carbanions (2) have been added to aldehydes and/or ketones the products ultimately converted into y-butyrolactones Q).l However, this methodology normally requires the use of system. We wish to report a B-lithiopropionate (2) to an adduct. complex reagents and/or several steps to elaborate the butanolide direct synthesis of y-lactones which involves the addition of lithium aldehyde or ketone followed by lactonization of the y-hydroxy acid --COH 2
📜 SIMILAR VOLUMES
## Abstract The reaction between (__Z__)‐1‐alkenyllithium and (__E__)‐β‐(N, N‐dialkylamino)‐α, β‐alkenals, (__E__)‐β‐(N, N‐dialkylamino)‐α, β‐alkenones or (__E__)‐β‐(N, N‐dialkylamino)‐α, β‐alkenoic esters yields mainly (__E, Z__)‐α, β‐γ, δ‐diunsaturated aldehydes, ketones, or esters and is therefo