**Reaction of 3‐Amino‐2__H__‐azirines with Diphenylcyclopropenethione** 3‐Dimethylamino‐2__H__‐azirines (**4a**, **4b**) react with diphenylcyclopropenethione (**8**) to give 4(3 __H__)‐pyridinethione derivatives of type **10** __(Scheme 3)__. The reaction mechanism for the formation of **10** is g
Silberioneninduzierte Reaktion von 3-Chlor-2-pyrrolidinocyclohexen mit 1,3-Dienen. Vorläufige Mitteilung
✍ Scribed by Rudolf Schmid; Hans Schmid
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- German
- Weight
- 256 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
3‐Chloro‐2‐pyrrolidinocyclohexene (3) in the presence of silver tetrafluoroborate in methylene chloride at −60° underwent cycloadditions with various 1,3‐dienes; the resulting iminium tetrafluoroborate salts 4a–8a were hydrolysed to give the bicyclic and tricyclic ketones 4b–8b. The addition reactions can be regarded as [3+4]‐cycloadditions of an intermediate 2‐aminoallyl cation.
📜 SIMILAR VOLUMES
**Nickel‐catalysed Reaction of 2‐Aza‐1, 3‐butadienes with 1, 3‐Butadiene** The nickel‐catalysed reaction of butadiene with 2‐azabutadienes yields a mixture of 1 aza‐1,5,9‐cyclododecatrienes, __N__‐alkylidene‐divinylcyclohexylamines and open chained 2:1 adducts.
## Abstract Irradiation of 2‐methyl‐ (**1c**) and __2,2__‐dimethyl‐3‐phenyl‐__2H__‐azirine (**1d**) in benzene solution in the presence of carbon dioxide yields __2__‐methyl‐4‐phenyl‐ (**3c**) and __2,2__‐dimethyl‐4‐phenyl‐3‐oxazolin‐5‐one (**3d**), respectively. Similar cycloadducts are observed (
## Abstract Irradiation of 2‐methyl‐ (**1a**), 2,2‐dimethyl‐ (**1b**) and 2,3‐diphenyl‐2__H__‐azirine (**1c**) in the presence of diethyl mesoxalate yields the corresponding 4‐phenyl‐5,5‐diethoxycarbonyl‐3‐ oxazolines **3a–c**. Similar cycloadducts are observed (cf. **6**) by irradiation of **1b**
**Thermal Rearrangement of 2‐Oxa‐bicyclo [3.3.1]‐non‐7‐en‐3‐ones; a Novel Lactone Rearrangement** Lactone (+)‐**2** was prepared by iodolactonisation and subsequent elimination in 51% yield from the known acid (+)‐**1** (__Scheme 1__). Alkylation of (+)‐**2** furnished (+)‐**3a**, (+)‐**3b** and (+
**Cyclols as Intermediates in the Reaction of 3‐(Dimethylamino)‐2,2‐dimethyl‐2__H__‐azirine with Monosubstituted Parabanic Acids; a New and Unexpected Rearrangement** The reaction of 3‐(dimethylamino)‐2,2‐dimethyl‐2__H__‐azirine (**1**) with __N__‐methylparabanic acid (**4**) in 2‐propanol at room