Amberlyst 15-Catalyzed Efficient Synthesis of 5-Acetyl-4-hydroxy-coumarone and 5-Acetyl-6-hydroxy-coumarone: Crucial Precursors for Several Naturally Occurring Furanoflavones
Three dibenzoylmethane derivatives from Lonchocarpus species
作者:Aderbal F. Magalhães、Ana Maria A. Tozzi、Eva G. Magalhães、Ivani S. Blanco、Marisa A. Nogueira
DOI:10.1016/s0031-9422(97)00340-3
日期:1997.11
petrol extracts of the roots of Lonchocarpus latifolius and L. muehlbergianus . Molecular structures were determined from spectroscopicdata, especially NMR techniques. An alkyl group bonded to the central carbon (C-8) of a natural dibenzoylmethane, had not been found before. Spectral data analysis suggested a preponderance of the respective diketotautomers.
Dipolar cycloaddition of rhodium carbenoids with vinyl esters. Total synthesis of pongamol and lanceolatin B
作者:Michael C. Pirrung、Yong Rok Lee
DOI:10.1016/s0040-4039(00)73399-5
日期:1994.8
A new method for dipolarcycloaddition of diazocyclohexane-1,3-diones, leading to benzofuran derivatives, has been applied to the totalsynthesis of natural products from Tephrosia and Pongamia.
An efficient transformation of furano-hydroxychalcones to furanoflavones via base mediated intramolecular tandem O-arylation and C–O bond cleavage: a new approach for the synthesis of furanoflavones
作者:Rajni Sharma、Ram A. Vishwakarma、Sandip B. Bharate
DOI:10.1039/c5ob01802a
日期:——
An efficient transformation of furano-hydroxychalcones to furanoflavonesviaan intramolecular tandemO-arylation followed by C–O bond cleavage is described.
一种高效的将呋喃羟基茵黄酮转化为呋喃黄酮的方法,通过分子内串联O芳基化,随后进行C-O键断裂。
Reduced sodium food products
申请人:GENERAL MILLS, INC.
公开号:US10159268B2
公开(公告)日:2018-12-25
Naturally-derived compounds having various structures elicit the perception of salty taste, enhance the perception of salty taste of a salt, or act at one or more sodium channels. Food products may include such naturally-derived compounds, which may be used to reduce the sodium content, while imparting a similar level of saltiness.
Composite pigment and method for preparing the same
申请人:Matsufuji Shinichi
公开号:US11523976B2
公开(公告)日:2022-12-13
The present invention relates to a composite pigment comprising at least one small hollow core particle and optionally at least one large core particle wherein the surface of the small hollow core particle is at least in part covered with at least one coating layer comprising at least one inorganic solid UV filter, and the surface of the large core particle is optionally at least in part covered with at least one coating layer comprising at least one inorganic solid UV filter and/or at least one coloring pigment. The composite pigment according to the present invention can provide enhanced UV filtering effects and safety, and optionally enhanced coloring effects.