A series of aromatic aldehydes are turned in to 3,3,6,6-tetramethy1-9-aryl-1,8-dioxooctahydroxanthene derivatives using trich/oroisocyanuric acid (TCCA) as the catalyst.
A convenient and efficient phosphine-free procedure for the one-pot conversion of primary,secondary and tertiary alcohols into the corresponding alkyl thiocyanates or alkyl isothiocyanates is described using trichloro...A convenient and efficient phosphine-free procedure for the one-pot conversion of primary,secondary and tertiary alcohols into the corresponding alkyl thiocyanates or alkyl isothiocyanates is described using trichloroisocyanuric acid/NHUSCN.展开更多
采用静态及半静态方法,研究了强氯精、高锰酸钾、甲醛对中华倒刺鲃幼鱼的急性毒性。实验结果(静态和半静态96 h LC_(50))显示,这3种刺激性渔药中强氯精对中华倒刺鲃幼鱼的毒性最强(1.50、1.13 mg·L^(-1)),其次是高锰酸钾(1.76、...采用静态及半静态方法,研究了强氯精、高锰酸钾、甲醛对中华倒刺鲃幼鱼的急性毒性。实验结果(静态和半静态96 h LC_(50))显示,这3种刺激性渔药中强氯精对中华倒刺鲃幼鱼的毒性最强(1.50、1.13 mg·L^(-1)),其次是高锰酸钾(1.76、1.24 mg·L^(-1)),最小的是甲醛(39.91、36.72 mg·L^(-1));它们在静态和半静态条件下的安全浓度分别为0.53、0.34,0.55、0.39,7.13、6.77 mg·L^(-1)。结果表明:含氯类(强氯精)、氧化剂类(高锰酸钾)、醛类(甲醛)对中华倒刺鲃幼鱼均具有一定的毒性,但是毒性较小,依然可以作为渔药使用。展开更多
基金the faculty of chemistry of Tarbiat Moallem University for supporting this work
文摘A series of aromatic aldehydes are turned in to 3,3,6,6-tetramethy1-9-aryl-1,8-dioxooctahydroxanthene derivatives using trich/oroisocyanuric acid (TCCA) as the catalyst.
基金Shahid Chamran University Research Council,Ahvaz,for financial support of this investigation
文摘A convenient and efficient phosphine-free procedure for the one-pot conversion of primary,secondary and tertiary alcohols into the corresponding alkyl thiocyanates or alkyl isothiocyanates is described using trichloroisocyanuric acid/NHUSCN.