A facile and efficient method has been developed for the synthesis of a small library of dibenzo[b,f][1,4]thiazepin-11(10H)-ones via Smiles rearrangement. Compounds were obtained in excellent isolated yields (70%-92%) under metal-free conditions. More specifically, this transition metal-free process relates to an environmentally friendly, economical, and efficient method for preparing benzoic-fused seven-membered lactams.
The synthesis of the title species from pyridazine derivative (I) and amides proceeds through Smiles rearrangement of an initially generated substitution product.
Personal charm is a kind of force which can generate strong attraction. Hosts' personality charm is a decisive factor of audience rating of TV programmes and also the soul of a programme. This paper starts from the composition of personality charm of TV programmes, analyzes development direction of each component in detail and studies the cultivation approaches, in the hope of really giving play to advantage of hosts' personality charm, promoting further development of TV programmes and forming correct guidance of social consciousness.
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