[Screening and identification of key enzyme genes for steroidal saponin biosynthesis in Dioscorea zingiberensis under low phosphorus stress].

To investigate the responses of key enzymes involved in steroidal saponin biosynthesis of Dioscorea zingiberensis to low phosphorus stress, we designed three treatments of severe phosphorus stress, moderate phosphorus stress, and normal phosphorus level. The D. zingiberensis plants were collected at the early, middle, and late stages of treatment.

Photoexcited sulfenylation of C(sp)-H bonds in amides using thiosulfonates.

A photoexcited sulfenylation of C(sp)-H bonds in amides is developed for the synthesis of sulfenyl amides using thiosulfonates as a sulfur source. In the presence of easily available and inexpensive Na-eosin Y, TBHP and KCO, various sulfenyl amides can be obtained under the irradiation of blue light at room temperature.