Results 81 to 90 of about 85,052 (233)

Total synthesis of 4-((3S,5R)-3,5- dihydroxynonadecyl)phenol

open access: yesResults in Chemistry
This communication describes a short and effective synthetic route for the enantioselective synthesis of 4-((3S,5R)-3,5-dihydroxynonadecyl)phenol. Key steps in this synthesis include the Wittig reaction, Barbier allylation, and Sharpless dihydroxylation.
Krishnaiah Kumari   +5 more
doaj   +1 more source

Enantioselective synthesis of (+)-petromyroxol, enabled by rhodium-catalyzed denitrogenation and rearrangement of a 1-sulfonyl-1,2,3-triazole [PDF]

open access: yes, 2015
Petromyroxol is a non-racemic mixture of enantiomeric oxylipids isolated from water conditioned with larval sea lamprey. The (+)-antipode exhibits interesting biological properties but only 1 mg was isolated from >100000 L of water.
Boyer, Alistair
core   +2 more sources

Catalytic enantioselective construction of axial chirality in 1,3-disubstituted allenes

open access: yesNature Communications, 2019
Highly enantioselective synthesis of allenes has been relying, so far, on the steric hindrance of substrates. Here the authors achieve excellent stereocontrol in the synthesis of chiral allenes with a palladium-DTBM-SEGPHOS catalytic system in a non ...
Shihua Song   +3 more
doaj   +1 more source

Enantioselective Synthesis of α‑Quaternary Mannich Adducts by Palladium-Catalyzed Allylic Alkylation: Total Synthesis of (+)-Sibirinine [PDF]

open access: yes, 2015
A catalytic enantioselective method for the synthesis of α-quaternary Mannich-type products is reported. The two-step sequence of (1) Mannich reaction followed by (2) decarboxylative enantioselective allylic alkylation serves as a novel strategy to in ...
Chiyoda, Koji   +3 more
core   +3 more sources

Thioketone-directed rhodium(I) catalyzed enantioselective C-H bond arylation of ferrocenes

open access: yesNature Communications, 2019
The development of straightforward methods for the synthesis of planar chiral ferrocenes remains highly challenging. Here, the authors report a rhodium(I)/phosphonate-catalyzed thioketone-directed enantioselective C-H bond arylation reaction for the ...
Zhong-Jian Cai   +4 more
doaj   +1 more source

Enantioselective Total Synthesis of (+)-Psiguadial B [PDF]

open access: yes, 2016
The first enantioselective total synthesis of the cytotoxic natural product (+)-psiguadial B is reported. Key features of the synthesis include (1) the enantioselective preparation of a key cyclobutane intermediate by a tandem Wolff rearrangement ...
Beck, Jordan C.   +3 more
core   +3 more sources

Algicidal lactones from the marine Roseobacter clade bacterium Ruegeria pomeroyi

open access: yesBeilstein Journal of Organic Chemistry, 2012
Volatiles released by the marine Roseobacter clade bacterium Rugeria pomeroyi were collected by use of a closed-loop stripping headspace apparatus (CLSA) and analysed by GC–MS.
Ramona Riclea   +5 more
doaj   +1 more source

Rapid Assembly of the Salvileucalin B Norcaradiene Core [PDF]

open access: yes, 2010
Preparation of the polycyclic core of the cytotoxic natural product salvileucalin B is described. The key feature of this synthetic strategy is a copper-catalyzed intramolecular arene cyclopropanation to provide the central norcaradiene.
Levin, Sergiy   +2 more
core   +1 more source

Biocatalysis as Useful Tool in Asymmetric Synthesis: An Assessment of Recently Granted Patents (2014–2019) [PDF]

open access: yes, 2019
The broad interdisciplinary nature of biocatalysis fosters innovation, as different technical fields are interconnected and synergized. A way to depict that innovation is by conducting a survey on patent activities.
Alcántara, Andrés R.   +2 more
core   +3 more sources

Formal total syntheses of classic natural product target molecules via palladium-catalyzed enantioselective alkylation

open access: yesBeilstein Journal of Organic Chemistry, 2014
Pd-catalyzed enantioselective alkylation in conjunction with further synthetic elaboration enables the formal total syntheses of a number of “classic” natural product target molecules. This publication highlights recent methods for setting quaternary and
Yiyang Liu   +11 more
doaj   +1 more source

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