128316-64-3Relevant academic research and scientific papers
Syntheses and novel bioactivities of artificial leaf-opening substances of Lespedeza cuneata G. Don, designed for the bioorganic studies of nyctinasty
Ueda, Minoru,Sawai, Yoshiyuki,Yamamura, Shosuke
, p. 10925 - 10936 (1999)
Potassium lespedezate (1) is the leaf-opening substance of a nyctinastic plant, Lespedeza cuneata G. Don. We have synthesized two sugar-derivatives of 1, potassium galactolespedezate (4) and mannolespedezate (6). Both 4 and 6 were quite effective for the leaf-opening of Cassia. mimosoides at 8 x 10-7 M, as strong as 1. However, 1 kept the leaf open only for a few days; on the other hand, 4 and 6 kept the leaf open after a week at that concentration. Additionally, remarkable difference was observed in the rate of enzymatic hydrolysis of natural and artificial leaf-opening sustance by using commercially available β-glucosidase. Therefore, 4 and 6 would not be hydrolized in the plant body, and are potentially useful molecular probes for the studies of the control of the nyctinastic leaf-movement by a biological clock.
Anomalous fluorinations of 3-aryl-2-hydroxypropanoic esters by diethylaminosulfur trifluoride (DAST)
Haigh, David,Jefcott, Lee J.,Magee, Katherine,McNab, Hamish
, p. 2895 - 2900 (2007/10/03)
Treatment of 3-aryl-2-hydroxypropanoic esters 8 with diethylaminosulfur trifluoride (DAST) gives considerable amounts of rearranged 2-aryl-3-fluoropropanoic esters 12 together with the expected products 11. The extent of rearrangement is dependent on solv
