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2 H-1,2,4-Benzothiadiazine 1,1-dioxides are prepared in good yields via reductive cyclisation of N,N-diethyl- o-nitrobenzenesulfonamides with appropriate nitriles promoted by SmI2 under mild and neutral conditions.

2,3-Dihydro-2-aryl-4(1H)-quinazolinones were prepared in good yields via reductive cyclisation of o-azidobeneamides with aldehydes and ketones promoted by SmI2 under mild and neutral conditions.

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