A concise and efficient synthesis of tetrahydroquinoline alkaloids using the phase transfer mediated Wittig olefination reaction

[Display omitted] •The total synthesis of 1,2,3,4-tetrahydroquinoline alkaloids, was carry out in three steps and high yields.•The key step of this approach is based on an unusual Wittig reaction by using the phase transfer medium.•This protocol is compatible with chiral aldehydes. The present study...

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Published inTetrahedron letters Vol. 58; no. 33; pp. 3311 - 3315
Main Authors Diaz-Muñoz, Gaspar, Isidorio, Raquel Geralda, Miranda, Izabel Luzia, de Souza Dias, Gabriel Nunes, Diaz, Marisa Alves Nogueira
Format Journal Article
LanguageEnglish
Published OXFORD Elsevier Ltd 16.08.2017
Elsevier
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Abstract [Display omitted] •The total synthesis of 1,2,3,4-tetrahydroquinoline alkaloids, was carry out in three steps and high yields.•The key step of this approach is based on an unusual Wittig reaction by using the phase transfer medium.•This protocol is compatible with chiral aldehydes. The present study describes the total synthesis of 1,2,3,4-tetrahydroquinoline alkaloids (±)-galipinine, (±)-cuspareine, (±)-galipeine and (±)-angustureine, in three steps and high yields (78%, 76%, 74%, and 66%, respectively) from common aldehyde and the ylide respectives. The key step of this approach is based on an unusual Wittig reaction by using the phase transfer medium (aq. NaOH/CH2Cl2 1:1 or t-BuOK/t-BuOH/CH2Cl2 1:1), affording olefinic intermediates in high yields.
AbstractList The present study describes the total synthesis of 1,2,3,4-tetrahydroquinoline alkaloids (+/-)-galipinine, (+/-)-cuspareine, (+/-)-galipeine and (+/-)-angustureine, in three steps and high yields (78%, 76%, 74%, and 66%, respectively) from common aldehyde and the ylide respectives. The key step of this approach is based on an unusual Wittig reaction by using the phase transfer medium (aq. NaOH/CH2Cl2 1:1 or t-BuOK/t-BuOH/CH2Cl2 1:1), affording olefinic intermediates in high yields. (C) 2017 Elsevier Ltd. All rights reserved.
[Display omitted] •The total synthesis of 1,2,3,4-tetrahydroquinoline alkaloids, was carry out in three steps and high yields.•The key step of this approach is based on an unusual Wittig reaction by using the phase transfer medium.•This protocol is compatible with chiral aldehydes. The present study describes the total synthesis of 1,2,3,4-tetrahydroquinoline alkaloids (±)-galipinine, (±)-cuspareine, (±)-galipeine and (±)-angustureine, in three steps and high yields (78%, 76%, 74%, and 66%, respectively) from common aldehyde and the ylide respectives. The key step of this approach is based on an unusual Wittig reaction by using the phase transfer medium (aq. NaOH/CH2Cl2 1:1 or t-BuOK/t-BuOH/CH2Cl2 1:1), affording olefinic intermediates in high yields.
Author de Souza Dias, Gabriel Nunes
Diaz-Muñoz, Gaspar
Isidorio, Raquel Geralda
Miranda, Izabel Luzia
Diaz, Marisa Alves Nogueira
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Issue 33
Keywords Wittig reaction
Galipea officinalis
Phase transfer medium
Tetrahydroquinoline alkaloids
ASYMMETRIC-SYNTHESIS
QUINOLINES
ALLYLIC AMINATION
ANGUSTUREINE
GALIPININE
(+)-ANGUSTUREINE
(+)-(S)-ANGUSTUREINE
GALIPEA-OFFICINALIS
HIGHLY ENANTIOSELECTIVE HYDROGENATION
ESTERS
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Snippet [Display omitted] •The total synthesis of 1,2,3,4-tetrahydroquinoline alkaloids, was carry out in three steps and high yields.•The key step of this approach is...
The present study describes the total synthesis of 1,2,3,4-tetrahydroquinoline alkaloids (+/-)-galipinine, (+/-)-cuspareine, (+/-)-galipeine and...
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SubjectTerms Chemistry
Chemistry, Organic
Galipea officinalis
Phase transfer medium
Physical Sciences
Science & Technology
Tetrahydroquinoline alkaloids
Wittig reaction
Title A concise and efficient synthesis of tetrahydroquinoline alkaloids using the phase transfer mediated Wittig olefination reaction
URI https://dx.doi.org/10.1016/j.tetlet.2017.07.044
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