Ultrasonic-assisted extraction and adsorption separation: Large-scale preparation of trans-ε-Viniferin, suffruficosol B and trans-Gnetin H for the first time.

In this study, a Standard Operating Procedure (SOP) for the large-scale extraction, enrichment, and separation of suffruticosol B (SB), trans-ε-Viniferin (TV), trans-gnetin H (TG) from oil tree peony seeds shell (PSS) was successfully constructed. The ultrasonic-assisted extraction (UAE), macroporous adsorption resin (MAR), and column chromatography (CC) were employed to extract, enrich and separate SB, TV and TG from PSS, and the conditions were optimized. The results implied that SB (1.6937 g), TV (0.5884 g) and TG (3.8786 g) with the purity of 99.67 %, 99.32 % and 98.54 %, respectively, were obtained after the extraction, enrichment and separation. The total yields of the SB, TV and TG were 0.61 mg/g, 0.02 mg/g and 6.64 mg/g with the total extraction rates at 70.55 %, 69.77 % and 78.36 %, respectively. This is the first report on the large-scale extraction, enrichment and separation of oligostilbenes. The SOP in this paper could produce high purity SB, TV and TG, and provide a new idea for PSS as a new oligostilbene resource. The study expands the new development and research field of PSS and provides theoretical support for the green utilization of oil tree peony.

Bromido(eta(5)-carboxycyclopentadienyl)dinitrosylchromium(0) and (eta(5)-benzoylcyclopentadienyl)bromidodinitrosylchromium(0).

In the structures of each of the title compounds, [CrBr(C(6)H(5)O(2))(NO)(2)], (I), and [CrBr(C(12)H(9)O)(NO)(2)], (II), one of the nitrosyl groups is located at a site away from the exocyclic carbonyl C atom of the cyclopentadienyl (Cp) ring, with twist angles of 174.5 (3) and 172.5 (1) degrees. The observed orientation is surprising, since the NO group is expected to be situated trans to an electron-rich C atom in the ring. The organic carbonyl plane is turned away from the Cp ring plane by 5.6 (8) and 15.2 (3) degrees in (I) and (II), respectively. The exocyclic C-C bond in (I) is bent out of the Cp ring plane towards the Cr atom by 2.8 (3) degrees , but is coplanar with the Cp ring in (II); the angle is 0.1 (1) degrees .