IR spectra of aliphatic isocyanates that are perchlorinated in the a-position indicate that in many cases these compounds exist partly or wholly as N-(a-chloroalky1idene)carbamoyl chlorides (1) 111. With compounds of amidine structure (2) they react under the conditions of the Schotten-Baumann react
Stereoelectronic effects in ring closure reactions
β Scribed by Jeremy P. Bradley; Terence C. Jarvis; C.David Johnson; Peter D. McDonnell; Timothy A.P. Weatherstone
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- French
- Weight
- 202 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The mechanistic criterion of reversed substituent effects in reactions, formally classified as 5-endo-trig and 6-endo-trig, is examined.
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