scholarly journals Modified Conditions for Copper-catalyzed ipso-Thiolation of Arylboronic Acid Esters with Thiosulfonates

2018 ◽  
Vol 47 (1) ◽  
pp. 85-88 ◽  
Author(s):  
Kazuya Kanemoto ◽  
Suguru Yoshida ◽  
Takamitsu Hosoya
Keyword(s):  
Arylboronic Acid ◽  
Acid Esters

Occurrence and Origin of the Tropylium Ion in the Mass Spectra of Arylboronic Acid Esters

1971 ◽  
Vol 49 (10) ◽  
pp. 1766-1770 ◽  
Author(s):  
R. J. Bose ◽  
M. D. Peters
Keyword(s):  
Mass Spectra ◽  
Phenylboronic Acid ◽  
Arylboronic Acid ◽  
Acid Esters

The mass spectra of a number of phenylboronic acid esters of 1,2- and 1,3-diols are examined and the presence and origin of the tropylium rearrangement ion is established.

Precision synthesis of fluorene-thiophene alternating copolymer by means of Suzuki-Miyaura catalyst-transfer condensation polymerization: importance of the position of alkyl substituent on thiophene of biaryl monomer to suppress disproportionation

2021 ◽  
Author(s):  
Yu Tokita ◽  
Masaru Katoh ◽  
Kentaro Kosaka ◽  
Yoshihiro Ohta ◽  
Tsutomu Yokozawa
Keyword(s):  
Alkyl Substituent ◽  
Condensation Polymerization ◽  
Arylboronic Acid ◽  
Alternating Copolymer ◽  
Precision Synthesis ◽  
Acid Esters ◽  
Model Reactions

Suzuki-Miyaura catalyst-transfer condensation polymerization (CTCP) of fluorene-thiophene biaryl monomers was investigated for the synthesis of well-defined poly(fluorene-alt-thiophene). Model reactions of α,ω-dibromo(fluorene-thiophene) with arylboronic acid esters showed that t-Bu3P Pd and...

1832-P: Palmitic Acid Esters of Hydroxy Stearic Acids Reduce Endogenous Glucose Production through GPR43 Activation

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 1832-P
Author(s):  
ANNA SANTORO ◽  
PENG ZHOU ◽  
YAN ZHU ◽  
ODILE D. PERONI ◽  
ANDREW T. NELSON ◽  
...  
Keyword(s):  
Palmitic Acid ◽  
Glucose Production ◽  
Endogenous Glucose Production ◽  
Endogenous Glucose ◽  
Acid Esters

Ketones from Nickel-Catalyzed Decarboxylative, Non-Symmetric Cross-Electrophile Coupling of Carboxylic Acid Esters

2019 ◽  
Author(s):  
Jiang Wang ◽  
Brian P. Cary ◽  
Peyton Beyer ◽  
Samuel H. Gellman ◽  
Daniel Weix
Keyword(s):  
Carboxylic Acid ◽  
Solid Support ◽  
Reaction Conditions ◽  
Decarboxylative Coupling ◽  
New Strategy ◽  
The Cross ◽  
Acyl Donors ◽  
Acid Esters

A new strategy for the synthesis of ketones is presented based upon the decarboxylative coupling of N-hydroxyphthalimide (NHP) esters with S-2-pyridyl thioesters. The reactions are selective for the cross-coupled product because NHP esters act as radical donors and the thioesters act as acyl donors. The reaction conditions are general and mild, with over 40 examples presented, including larger fragments and the 20-mer peptide Exendin(9-39) on solid support.

Arylboronic Acid-Catalyzed C-Allylation of Unprotected Oximes

2019 ◽  
Author(s):  
Juha Siitonen ◽  
Padmanabha V. Kattamuri ◽  
Muhammed Yousufuddin ◽  
Laszlo Kurti
Keyword(s):  
Total Synthesis ◽  
Acid Catalysts ◽  
Mechanistic Studies ◽  
Arylboronic Acid ◽  
Synthetic Utility ◽  
Acid Catalyzed

Unprotected keto- and aldoximes are readily <i>C</i>-allylated with allyl diisopropyl boronate in the presence of arylboronic acid catalysts to yield highly-substituted <i>N</i>-alpha-secondary (2°) and tertiary (3°) hydroxylamines. The method’s synthetic utility is demonstrated with the total synthesis of the trace alkaloid <i>N</i>-methyl-euphococcine. Preliminary experimental and computational mechanistic studies point toward the formation of a boroxine as the active allylating species.<br>

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