ABSTRACT
An ambient-light-promoted stereospecific olefinic C(sp2)-S bond construction of thioacids and 1,1-diarylethenes has been demonstrated, affording various (Z)-vinyl thioesters in 51-85% yields under solvent- and catalyst-free conditions. Mechanistic studies indicated that the formation of thioacid-olefin complexes is responsible for generating a carbonyl thiyl radical and dioxygen in the air participates in the reaction and functions as a traceless reagent. Moreover, synthetic applications have been demonstrated by the gram scale synthesis and aggregation-induced emission property of representative compound 3i.
ABSTRACT
The endophytic bacterum 01-144 was marked by using the method of antib iotic-resistance. Colonization of 01-144 in tomato root and stem was investig ate d. Result showed that 01-144 colonized in the root and stem and the colonizing a bility in the root was stronger than in the stem after dipping seed or watering root treatmeat, It was also found that this bacterium could more easly colonized in the low stem than in the upper stem. The population fluctuation of 01-144 ha d the same trend in both root and stem i.e.first increased then decreasing, an d the fluctuation in the root was more even than in the stem.