## Abstract 2, 2, 3‐Triphenyl‐2__H__‐azirine (**4a**) in a matrix of 2, 2‐dimethylbutane/pentane 8:3 (DMBP) at −185° gave rise on irradiation with light of 250–350 nm to a new UV.‐maximum at 350 nm (Fig. 1). We assign the dipole benzonitrildiphenylmethylide (**1a**) to this new maximum. Irradiation
Übergangsmetall-katalysierte Additionsreaktionen von 3-Phenyl-2H-azirinen und Acetylencarbonsäureestern
✍ Scribed by Akira Inada; Heinz Hefmgartner
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- German
- Weight
- 562 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Transition Metal Catalyzed Addition Reactions of 3‐Phenyl‐2__H__‐azirines and Alkyl Acetylene Carboxylates
In the presence of molybdenum hexacarbonyl, the 3‐phenyl‐2__H__‐azirines 1 and 7 react with alkyl acetylene carboxylates 2 via the cleavage of the C, N‐double bond to give 2__H__‐pyrroles 5 or pyrrole 9 (Table), whose structures were deduced from the spectra data, in particular ^13^C‐NMR. data. The 2__H__‐pyrrole 5a was also obtained by treatment of a mixture of 1 and 2a with tungsten hexachloride. A tentative mechanism for the formation of the 2__H__‐pyrroles is formulated.
📜 SIMILAR VOLUMES
Boron‐Trifluoride‐Catalyzed Reactions of 3‐Amino‐2__H__‐azirines with Amino‐acid Esters and Amines After activation by protonation or complexation with BF~3~, 3‐amino‐2__H__‐azirines 1 react with the amino group of α‐amino‐acid esters 3 to give 3,6‐dihydro‐5‐aminopyrazin‐2(1__H__)‐ones 4 by ring en
## Abstract Irradiation of 3‐phenyl‐2__H__‐azirine (**2**) in benzene solution with a high‐pressure mercury lamp yields 4,5‐diphenyl‐1,3‐diazabicyclo[3,1,0]hex‐3‐ene (**4**) and not 3‐phenylimino‐4‐phenyl‐1‐azabicyclo[2,1,0]pentane (**1**), as had been reported previously by others [2]. 2‐Methyl‐3‐
## Abstract Bei der Umsetzung der 2‐Phenyl‐substituierten Azirine **1b** und **c** mit den Isocyanaten **2a** — **e** wird im Gegensatz zu der mit **1a** die 1,2‐Bindung gespalten. Der entstehende 1,5‐Dipol **4** kann sich durch H‐Wanderung zu **5** oder durch Ringschluß zu **6** bzw. **7** stabili
## 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**