𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On the Cycloaddition-Elimination Reactions of 1,2,3,4-Thiatriazoline-5-Imines with Ketenes

✍ Scribed by Gerrit L'abbé; Ingrid Sannen

Publisher
Wiley (John Wiley & Sons)
Year
2010
Weight
94 KB
Volume
100
Category
Article
ISSN
0037-9646

No coin nor oath required. For personal study only.

✦ Synopsis

In recent publications we have discussed the mechanistic aspects of the cycloaddition-elimi-2 nation reactions of 1,2,3,4-thiatriazoline-5-imines 1 with isothiocyanates, isocyanates and electrophilic nitriles. Rased on the knowledge gained from these experiments we expect that the reactions of 1 with ketenes should first produce thiazolidines of type 2. which may then undergo further cycloaddition-elimination reactions to give the isomeric products 3 , the distribution of products being dependent on the nucleophilicity of the R 1 and R2 substituents.

📜 SIMILAR VOLUMES

On the Mechanism of the Reactions of 4-A
On the Mechanism of the Reactions of 4-Alkyl-5-Arylimino-1,2,3,4-Thiatriazolines with Isocyanates
✍ Gerrit L'abbé; Ernestine Albrecht 📂 Article 📅 2010 🏛 Wiley (John Wiley & Sons) ⚖ 108 KB

Although the first cycloaddition-elimination reactions of 4-alkyl-5-arylimino-1,2,3,4-thiatriazolines (1) with heterocumulenes were reported in 1976-78,' insight into the mechanistic puzzle has been gained recently, and then only for isothiocyanates.2 For isocyanates, which furnish l ,2,4-thiadiazol

Kinetics of the [2+ + 4]-Cycloaddition R
Kinetics of the [2+ + 4]-Cycloaddition Reactions of 1,3-Dithian-2-ylium Ions with 1,3-Dienes
✍ Herbert Mayr; Joachim Henninger 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 287 KB 👁 1 views

The kinetics of the [2 + + 4] cycloadditions of 1,3-dithian-2-cycloaddition pathway by the correlation lg k = s (E + N). Though a concerted cycloaddition pathway is not excluded ylium ions (1) with 1,3-dienes was investigated photometrically in dichloromethane. The second-order rate by this finding,