CHIRALLY SELECTIVE SYNTHESIS OF NATURAL PRODUCTS. THE 10-HYDROXY ANALOGS OF DIHYDROQUININE

1981 ◽  
pp. 299-306 ◽  
Author(s):  
M.R. Uskoković ◽  
I.M. Kompis
Keyword(s):  
Natural Products ◽  
Selective Synthesis

Visible-light-promoted E-selective synthesis of α-fluoro-β-arylalkenyl sulfides via the deoxygenation/isomerization process

2021 ◽  
Author(s):  
Yuxiu Li ◽  
Xiangqian Li ◽  
Xiaowei Li ◽  
Dayong Shi
Keyword(s):  
Natural Products ◽  
Visible Light ◽  
Late Stage ◽  
Regioselective Synthesis ◽  
Selective Synthesis ◽  
Isomerization Process

Highly E-selective synthesis of α-fluoro-β-arylalkenyl sulfides: regioselective synthesis of α-fluoro-β-arylalkenyl sulfides has been established with gem-difluoroalkenes and sodium arysulfinates via visible-light-induced deoxygenation of S–O bonds and isomerization of alkenes. Moreover, the strategy is also applied in the late-stage modification of complex natural products and drugs.

Ph3PAuNTf2 as a Superior Catalyst for the Selective Synthesis of 2H-Chromenes: Application to the Concise Synthesis of Benzopyran Natural Products

2011 ◽  
Vol 2011 (12) ◽  
pp. 2334-2338 ◽  
Author(s):  
Ioannis N. Lykakis ◽  
Christina Efe ◽  
Charis Gryparis ◽  
Manolis Stratakis
Keyword(s):  
Natural Products ◽  
Selective Synthesis

scholarly journals Thiourea-catalyzed Diels–Alder reaction of a naphthoquinone monoketal dienophile

2013 ◽  
Vol 9 ◽  
pp. 1414-1418 ◽  
Author(s):  
Carsten S Kramer ◽  
Stefan Bräse
Keyword(s):  
Natural Products ◽  
Total Synthesis ◽  
Alder Reaction ◽  
Diels Alder ◽  
Selective Synthesis ◽  
Quaternary Center ◽  
Diels Alder Reaction ◽  
Cycloaddition Product ◽  
Sterically Hindered ◽  
First Time

A variety of organocatalysts were screened for the catalysis of the naphthoquinone monoketal Diels–Alder reaction. In this study we found that Schreiner's thiourea catalyst 10 and Jacobson's thiourea catalyst 12 facilitate the cycloaddition of the sterically hindered naphthoquinone monoketal dienophile 3 with diene 4. The use of thiourea catalysis allowed for the first time the highly selective synthesis of the exo-product 2a in up to 63% yield. In this reaction a new quaternary center was built. The so formed cycloaddition product 2a represents the ABC tricycle of beticolin 0 (1) and is also a valuable model substrate for the total synthesis of related natural products.

ChemInform Abstract: Ph3PAuNTf2 as a Superior Catalyst for the Selective Synthesis of 2H-Chromenes: Application to the Concise Synthesis of Benzopyran Natural Products.

ChemInform ◽  
2011 ◽  
Vol 42 (35) ◽  
pp. no-no
Author(s):  
Ioannis N. Lykakis ◽  
Christina Efe ◽  
Charis Gryparis ◽  
Manolis Stratakis
Keyword(s):  
Natural Products ◽  
Selective Synthesis
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