Investigation of Methods for Seven-Membered Ring Synthesis:  A Practical Synthesis of 4-Oxo-5,6,7,8-tetrahydro-4H-cyclohepta[b]furan-3-carboxylic Acid

2001 ◽  
Vol 5 (5) ◽  
pp. 498-507 ◽  
Author(s):  
John A. Ragan ◽  
Jerry A. Murry ◽  
Michael J. Castaldi ◽  
Alyson K. Conrad ◽  
Brian P. Jones ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Membered Ring ◽  
Practical Synthesis ◽  
Ring Synthesis

ChemInform Abstract: A Surprising Eight-Membered Ring Synthesis Leading To Enantiomerically Pure Tricyclic Benzodiazepine Derivatives.

ChemInform ◽  
2010 ◽  
Vol 26 (29) ◽  
pp. no-no
Author(s):  
A. HAKIKI ◽  
M. MOSSADAK ◽  
M. MOKHLES ◽  
F. ROUESSAC ◽  
H. DUDDECK ◽  
...  
Keyword(s):  
Membered Ring ◽  
Enantiomerically Pure ◽  
Benzodiazepine Derivatives ◽  
Ring Synthesis

A Practical Synthesis of 1-Oxo-1,2,3,4-tetrahydroisoquinoline-3-carboxylic Acid Esters

2010 ◽  
Vol 20 (10) ◽  
pp. 1070-1072 ◽  
Author(s):  
Lei Tang ◽  
Yu-She Yang ◽  
Ru-Yun Ji
Keyword(s):  
Carboxylic Acid ◽  
Practical Synthesis ◽  
Acid Esters

scholarly journals Electrophilic boron carboxylate and phosphinate complexes

2019 ◽  
Vol 48 (6) ◽  
pp. 2038-2045 ◽  
Author(s):  
Diya Zhu ◽  
James H. W. LaFortune ◽  
Rebecca L. Melen ◽  
Douglas W. Stephan
Keyword(s):  
Carboxylic Acid ◽  
Membered Ring ◽  
Ring Species ◽  
Derivatives Of

A series of carboxylic acid derivatives of the form [RC(O)OB(C6F5)]2O, (R = Tol, Ph, C6F5, Me2BrC, Me) were prepared with the concurrent reduction to the corresponding aldehyde. The mechanism is proposed to proceed via cyclic eight-membered ring species.

Chiral Mo−Binol Complexes:  Activity, Synthesis, and Structure. Efficient Enantioselective Six-Membered Ring Synthesis through Catalytic Metathesis

1999 ◽  
Vol 121 (36) ◽  
pp. 8251-8259 ◽  
Author(s):  
S. Sherry Zhu ◽  
Dustin R. Cefalo ◽  
Daniel S. La ◽  
Jennifer Y. Jamieson ◽  
William M. Davis ◽  
...  
Keyword(s):  
Membered Ring ◽  
Ring Synthesis

The mechanism investigation of the imidazolidinone catalyzed five-membered ring synthesis reaction

2012 ◽  
Vol 26 (3) ◽  
pp. 232-239 ◽  
Author(s):  
Lili Zhang ◽  
Huiling Liu ◽  
Yuhong Yang ◽  
Zhihui Chong ◽  
Tingting Feng ◽  
...  
Keyword(s):  
Membered Ring ◽  
Synthesis Reaction ◽  
Ring Synthesis

scholarly journals Crystal structure of 7,7-dimethyl-6-methylidenetricyclo[6.2.1.01,5]undecane-2-carboxylic acid

2015 ◽  
Vol 71 (2) ◽  
pp. o94-o94
Author(s):  
Noureddine Beghidja ◽  
Samir Benayache ◽  
Fadila Benayache ◽  
David W. Knight ◽  
Benson M. Kariuki
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Rotation Axis ◽  
Chair Conformation ◽  
Membered Ring ◽  
Envelope Conformation ◽  
Compound C ◽  
Carboxylic Groups

In the title compound, C15H22O2, both five-membered rings display an envelope conformation whereas the six-membered ring displays a chair conformation. In the crystal, pairs of O—H...O hydrogen bonds between carboxylic groups link molecules, related by a twofold rotation axis, into supramolecular dimers.

A Practical Synthesis of 3,3-Difluorocyclobutane Carboxylic Acid.

ChemInform ◽  
2005 ◽  
Vol 36 (48) ◽  
Author(s):  
Dirk Elend ◽  
David Fengas ◽  
M. Jonathan Fray
Keyword(s):  
Carboxylic Acid ◽  
Practical Synthesis

Massenspektrometrische Untersuchungen an Borchelaten der Pyridin- und Chinolin-Reihe und deren N-Oxiden / Mass Spectrometric Investigations on Boron Chelates of the Pyridine and Quinoline Type and their N-Oxides

1973 ◽  
Vol 28 (7-8) ◽  
pp. 440-445 ◽  
Author(s):  
Eberhard Hohaus ◽  
Wolfgang Riepe
Keyword(s):  
Carboxylic Acid ◽  
Mass Spectra ◽  
Membered Ring ◽  
Mass Spectrometric ◽  
Ring Closure ◽  
Boron Chelates ◽  
Boron Chelate

Mass spectra of chelate-6-rings (N-oxide-chelates) are similar to those of comparable chelate-5-rings after elimination of oxygen from the fragment ion (M-C6H5). It is assumed that the fragment ion [(M-C6H5)-O] exists as a five-membered ring.However, there are two exceptions which are: The diphenyl boron chelate of pyridine-2-carboxylic acid anilide N-oxide with O-B-O-coordination and the difluorine boron chelate of 8-hydroxyquinoline N-oxide. The stable fragment OBX (X = C6H5F) is eliminated directly from the fragment ion (M-X). It is assumed the ring closure in [(M-X)-O] obviously is less favoured. The preparation of both 5-ring-chelates using the components is impossible, too.

ChemInform Abstract: Practical Synthesis of 4′-Methylbiphenyl-2-carboxylic Acid.

ChemInform ◽  
2010 ◽  
Vol 26 (34) ◽  
pp. no-no
Author(s):  
T. HATTORI ◽  
N. HAYASHIZAKA ◽  
S. MIYANO
Keyword(s):  
Carboxylic Acid ◽  
Practical Synthesis
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