A ZEKE photoelectron spectroscopy and ab initio study of the cis- and trans-isomers of formanilide: Characterizing the cationic amide bond ?

Butterfly pea flower have great sensory attraction, but they have not yet been used widely in Vietnam. Extracts of butterfly pea flowers can be used conveniently as a natural blue colorant for food products. In this study, the identification of anthocyanin compounds in butterfly pea flowers was performed by UPLC coupled with a UV and Mass spectrometer instrument. Positive and negative ion electrospray MS/MS chromatograms and spectra of the anthocyanin compounds were determined. By analyzing the chromatograms and spectra for each ion, five anthocyanins were identified in the butterfly pea flower extract; these were delphinidin-3-(6”‐p-coumaroyl)-rutinoside, cyanidin 3-(6”-p-coumaroyl)-rutinoside, delphinidin-3-(p-coumaroyl) glucose in both cis- and trans- isomers, cyanidin-3-(p-coumaroyl-glucoside) and delphinidin-3-pyranoside. Additionally, based on their intensity, it was determined that cyanidin-3-(p-coumaroyl-glucoside) was the most abundant anthocyanin, followed by cyanidin 3-(6”-p-coumaroyl)-rutinoside, delphinidin-3-(p-coumaroyl-glucoside), delphinidin-3-(6”-p-coumaroyl)-rutinoside and delphinidin-3-pyranoside. In this study, cyanidin derivatives were discovered in butterfly pea flower extract, where these compounds had not been detected in previous studies.

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Cis-and trans-isomers of [Rh(en)2X2]+ where X = Cl and Br. Possible use of 13C NMR spectroscopy in their identification

Inorganica Chimica Acta ◽

10.1016/s0020-1693(00)85701-1 ◽

1975 ◽

Vol 14 ◽

pp. L37-L38 ◽

Cited By ~ 4

Author(s):

C. Burgess ◽

F.R. Hartley

Keyword(s):

Nmr Spectroscopy ◽

13C Nmr ◽

13C Nmr Spectroscopy ◽

Trans Isomers ◽

Cis And Trans Isomers ◽

Cis And Trans

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Separation of cis and trans Isomers of Polyproline by FAIMS Mass Spectrometry

Journal of the American Society for Mass Spectrometry ◽

10.1007/s13361-016-1482-1 ◽

2016 ◽

Vol 27 (12) ◽

pp. 2071-2074 ◽

Cited By ~ 4

Author(s):

Andrew J. Creese ◽

Helen J. Cooper

Keyword(s):

Mass Spectrometry ◽

Trans Isomers ◽

Cis And Trans Isomers ◽

Cis And Trans

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PREPARATION OF ERUCIC AND NERVONIC ACIDS LABELLED WITH CARBON-14

Canadian Journal of Chemistry ◽

10.1139/v57-107 ◽

1957 ◽

Vol 35 (8) ◽

pp. 757-760 ◽

Cited By ~ 11

Author(s):

K. K. Carroll

Keyword(s):

Enoic Acid ◽

Nervonic Acid ◽

Malonic Ester ◽

Ester Synthesis ◽

Trans Isomers ◽

Carbon 14 ◽

Cis And Trans Isomers ◽

Cis And Trans

The malonic ester synthesis of nervonic acid (tetracos-15-enoic acid) has been modified so that the product consists of pure cis rather than a mixture of cis and trans isomers. The modified synthesis has been used for the preparation of C14-labelled erucic and nervonic acids.

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Synthesis of cis and trans Isomers of D-Ring Linked Bis-Steroid Pyrazines from 16α-Bromo-17-oxosteroids

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20020047 ◽

2002 ◽

Vol 67 (1) ◽

pp. 47-54 ◽

Cited By ~ 5

Author(s):

Zenon Łotowski ◽

Jacek W. Morzycki ◽

Izabella S. Niewczas ◽

Marta Zdanowicz

Keyword(s):

Gaseous Ammonia ◽

Analogous Reaction ◽

Air Oxidation ◽

Trans Isomers ◽

Hydrolysis Products ◽

Cis And Trans Isomers ◽

Cis And Trans

Treatment of 16α-bromo-17-oxosteroids 1 and 2 with gaseous ammonia and successive air-oxidation afforded the cis and trans isomers of D-linked bis-steroid pyrazines. Analogous reaction of 1α-bromo-4-nor-5α-cholestan-2-one (3) led to unexpected hydrolysis products.

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