Call us toll-free

Quick academic help

Don't let the stress of school get you down! Have your essay written by a professional writer before the deadline arrives.

Calculate the price

Pages:

275 Words

$19,50

18.2A Wittig Synthesis of Stilbenes by Paul Kim on Prezi

N2 - Glycosylated stilbenes are biologically active secondary metabolites of plants and have the potential to alleviate a broad range of human diseases. However, some of these compounds are not naturally abundant, and thus the synthesis of such molecules is desirable. This paper reports the first synthesis of oxyresveratrol 2-O-β-d-glucopyranoside (1) and 2,3,5,4′-tetrahydroxystilbene 2-O-β-d-glucopyranoside (1′), which are stilbene glycosides obtained from the rhizomes of Schoenocaulon officinale and Polygonum multiflorum, respectively. A facile four-step synthesis of 1 involved selective protection of the hydroxy groups and Wittig olefination to generate the compound in 8% overall yield. For compound 1′, a 10-step synthesis utilized selective protection of the hydroxy groups, Baeyer-Villiger oxidation, modified Duff formylation, and Wittig olefination to generate the compound in 6.9% overall yield.

Preparation of (Z)- and (E)-Stilbenes by a Wittig Reaction

Outline a synthesis for cis and trans stilbene (the 1,2-diphenylethenes) using the Wittig reaction?
Hi this is a question for my organic chemistry lab. it is the 1,4-Diphenyl-1,3-butadiene lab.

The Wittig Reaction Synthesis of Stlbene - Duration: 23:49

Synthesis of Trans-Stilbene – Sample Essays

AB - Glycosylated stilbenes are biologically active secondary metabolites of plants and have the potential to alleviate a broad range of human diseases. However, some of these compounds are not naturally abundant, and thus the synthesis of such molecules is desirable. This paper reports the first synthesis of oxyresveratrol 2-O-β-d-glucopyranoside (1) and 2,3,5,4′-tetrahydroxystilbene 2-O-β-d-glucopyranoside (1′), which are stilbene glycosides obtained from the rhizomes of Schoenocaulon officinale and Polygonum multiflorum, respectively. A facile four-step synthesis of 1 involved selective protection of the hydroxy groups and Wittig olefination to generate the compound in 8% overall yield. For compound 1′, a 10-step synthesis utilized selective protection of the hydroxy groups, Baeyer-Villiger oxidation, modified Duff formylation, and Wittig olefination to generate the compound in 6.9% overall yield.

T1 - Total Synthesis of Two Glycosylated Stilbenes, Oxyresveratrol 2-O-β- d -Glucopyranoside and 2,3,5,4′-Tetrahydroxystilbene 2-O-β- d -Glucopyranoside

04.07.2014 · Synthesis of E-Stilbene Introduction: ..

Wittig Reaction Synthesis Trans Stilbene Free Essays

If you are looking for a synthesis of 1,4-diphenylbutadiene by a Wittig reaction, I believe this should work. I don't know if it will give you this isomer or not.



The mechanism of the this reaction is found and A Handbook of Organic Chemistry Mechanisms ( or ).

It is also shown .

"Olefin Synthesis with Organic Phosphonate Carbanions," J. Boutagy and R. Thomas, 1974, , 87. "Synthetic Applications of Phosphoryl Stabilized Anions," W. S. Wadsworth, Jr. 1977, , 73. "Wadsworth-Emmons Reaction Revisited," W. J. Stec, 1983, , 411. "Vinylphosphonates in Organic Synthesis," Minami, T.; Motoyoshiya, J. 1992, 333. Minami, T.; Okauchi, T.; Kouno, R. α-Phosphonovinyl Carbanions in Organic Synthesis. 2001, 349-57. "Stereocontrol in Organic Synthesis Using the Diphenylphosphoryl Group," Clayden, J.; Warren, S. 1996, , 241-70.

SYNTHESIS OF EPOXIDES USING DIMETHYLDIOXIRANE: trans-STILBENE OXIDE ..
Order now
  • UNMATCHED QUALITY

    As soon as we have completed your work, it will be proofread and given a thorough scan for plagiarism.

  • STRICT PRIVACY

    Our clients' personal information is kept confidential, so rest assured that no one will find out about our cooperation.

  • COMPLETE ORIGINALITY

    We write everything from scratch. You'll be sure to receive a plagiarism-free paper every time you place an order.

  • ON-TIME DELIVERY

    We will complete your paper on time, giving you total peace of mind with every assignment you entrust us with.

  • FREE CORRECTIONS

    Want something changed in your paper? Request as many revisions as you want until you're completely satisfied with the outcome.

  • 24/7 SUPPORT

    We're always here to help you solve any possible issue. Feel free to give us a call or write a message in chat.

Order now

Wittig Synthesis of trans-9-(2-phenylethenyl) - Yumpu

Glycosylated stilbenes are biologically active secondary metabolites of plants and have the potential to alleviate a broad range of human diseases. However, some of these compounds are not naturally abundant, and thus the synthesis of such molecules is desirable. This paper reports the first synthesis of oxyresveratrol 2-O-β-d-glucopyranoside (1) and 2,3,5,4′-tetrahydroxystilbene 2-O-β-d-glucopyranoside (1′), which are stilbene glycosides obtained from the rhizomes of Schoenocaulon officinale and Polygonum multiflorum, respectively. A facile four-step synthesis of 1 involved selective protection of the hydroxy groups and Wittig olefination to generate the compound in 8% overall yield. For compound 1′, a 10-step synthesis utilized selective protection of the hydroxy groups, Baeyer-Villiger oxidation, modified Duff formylation, and Wittig olefination to generate the compound in 6.9% overall yield.

Order now
  • You submit your order instructions

  • We assign an appropriate expert

  • The expert takes care of your task

  • We send it to you upon completion

Order now
  • 37 684

    Delivered orders

  • 763

    Professional writers

  • 311

    Writers online

  • 4.8/5

    Average quality score

Order now
  • Kim

    "I have always been impressed by the quick turnaround and your thoroughness. Easily the most professional essay writing service on the web."

  • Paul

    "Your assistance and the first class service is much appreciated. My essay reads so well and without your help I'm sure I would have been marked down again on grammar and syntax."

  • Ellen

    "Thanks again for your excellent work with my assignments. No doubts you're true experts at what you do and very approachable."

  • Joyce

    "Very professional, cheap and friendly service. Thanks for writing two important essays for me, I wouldn't have written it myself because of the tight deadline."

  • Albert

    "Thanks for your cautious eye, attention to detail and overall superb service. Thanks to you, now I am confident that I can submit my term paper on time."

  • Mary

    "Thank you for the GREAT work you have done. Just wanted to tell that I'm very happy with my essay and will get back with more assignments soon."

Ready to tackle your homework?

Place an order