Carbon‐¹³chemical shift analysis of 2‐thio‐3,4‐dihydro‐2h‐1, 3‐benzoxazine‐4‐ones and their degradation products with water and amines

Abstract

The analysis of ¹³C‐chemical shifts of substituted 2‐thioxo (1) and 2‐oxo‐3,4‐dihydro‐2H‐l,3‐benzoxazine‐4‐ones (1) were achieved. Furthermore the 2‐amino derivative (3) and N‐salicyloyl‐N'‐alkylthiourea (4) were also analysed.

Key words:

• ¹³C‐analysis of 2‐thio‐3,4‐dihydro‐2H‐1,3‐benzoxazine‐4‐ones derivatives

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