Application In Synthesis of (2R,3R,4S,5R,6R)-2-(Hydroxymethyl)-6-methoxytetrahydro-2H-pyran-3,4,5-triol. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: (2R,3R,4S,5R,6R)-2-(Hydroxymethyl)-6-methoxytetrahydro-2H-pyran-3,4,5-triol, is researched, Molecular C7H14O6, CAS is 1824-94-8, about Comparative GC-MS analysis of nine different seasonal flowers growing in selected region of Pakistan. Author is Rehman, Sidra; Sultana, Nighat; Ahmad, Dildar; Sultana, Tasawar; Haleem, Kashif Syed.
The current study was aimed to analyze and identify the flowers volatile from seasonal flowers grown in Hazara. For this purpose a comparative study of volatile compounds from aqueous fractions of nine different seasonal flowers in terms of qual. and quant. composition was done by gas chromatog.-mass spectrometry (GC/MS). The mass spectrum of unknown compounds was identified by comparing the mass spectrum of known compounds using NIST 5 library search program and available standards library. Total 67 compounds were identified belongs to different classes of organic compounds i.e esters, fatty acyls, terpenoid, saponins, tannins, alkaloids, aldehydes, ketones and hydrocarbons were identified in V. chamaedrys, L. sinense, I. coccinea, G. rigens, L. lucidum, A. belladonna, P. lanceolata, R. indica and C. viminalis. The main compounds in nine different seasonal flowers were mono(2-ethylhexyl) phthalate, n-hexadecanoic acid, phytol, 6-octadecenoic acid. The concentration of this compound was more in Veronica chamaedrys (28.851%) and on the other hand having fewer amounts in flower Ixora coccinea (0.218%) and some compounds identified only in one flower such as caryophyllene. Most of the compounds were present in all selected flower while there were also some unique compounds which were present in one flower while absent in other. Similarly, identified compounds suggested their role in the field of medicines and pharmaceutical sciences which need further investigations.
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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate