New synthesis of isoxazoles and isothiazoles. A convenient synthesis of thioenaminones from enaminones

1980 ◽  
Vol 45 (24) ◽  
pp. 4857-4860 ◽  
Author(s):  
Yang-I Lin ◽  
Stanley A. Lang
Keyword(s):  
New Synthesis ◽  
Convenient Synthesis

A CONVENIENT SYNTHESIS OF DL-GLUTAMIC ACID FROM β-PROPIOLACTONE

1956 ◽  
Vol 34 (10) ◽  
pp. 1440-1443 ◽  
Author(s):  
Guy Talbot ◽  
Roger Gaudry ◽  
Louis Berlinguet
Keyword(s):  
Glutamic Acid ◽  
Acid Hydrolysis ◽  
Sodium Salt ◽  
Intermediate Product ◽  
Diethyl Ester ◽  
New Synthesis ◽  
Convenient Synthesis

A new synthesis of DL-glutamic acid was carried out in an over-all yield of 87% from condensation between β-propiolactone and the sodium salt of diethyl acetamidomalonate, followed by acid hydrolysis. When desired, the intermediate product, the diethyl ester of N-acetyl-2-carbethoxyglutamic acid, could be isolated in a 68% yield and hydrolyzed to glutamic acid via the hydrochloride in a 95% yield.

A new synthesis of 2,10,11-trioxatricyclo[4.4.4.01,6]tetradecane

1980 ◽  
Vol 58 (9) ◽  
pp. 875-877 ◽  
Author(s):  
Normand Beaulieu ◽  
Pierre Deslongchamps
Keyword(s):  
New Synthesis ◽  
Convenient Synthesis

A simple and convenient synthesis of tricyclic orthoester 1 (2,10,11-trioxatricyclo[4.4.4.01,6]tetradecane) is described.

A New Synthesis of Pyrazino[2,3-c]isoquinolines

1990 ◽  
Vol 43 (1) ◽  
pp. 179 ◽  
Author(s):  
MRM Bates ◽  
LW Deady ◽  
MF Mackay
Keyword(s):  
Crystal Structure ◽  
Ethyl Pyruvate ◽  
Ring Closure ◽  
Full Matrix ◽  
Space Group ◽  
Nucleophilic Displacement ◽  
New Synthesis ◽  
Convenient Synthesis ◽  
Displacement Reactions ◽  
Title System

A convenient synthesis of 1-(p-chlorophenoxy )isoquinoline-3,4-diame is described. Condensation with ethyl pyruvate gave entry to the tricyclic title system, and some further nucleophilic displacement reactions of substituent groups are described. The direction of ring closure in the tricycle formation was proved by determining the crystal structure of one of the derivatives; rhombohedral crystals of (3b) belong to the space group R3 with a 21.822(5)Ǻ, α 116.81(2)° and Z 12. Full-matrix refinement using 3093 reflections converged at R 0.085.

scholarly journals A NEW SYNTHESIS OF DL-γ-HYDROXY-ORNITHINE

1956 ◽  
Vol 34 (7) ◽  
pp. 911-914 ◽  
Author(s):  
Guy Talbot ◽  
Roger Gaudry ◽  
Louis Berlinguet
Keyword(s):  
Acid Hydrolysis ◽  
Allyl Chloride ◽  
Quantitative Yield ◽  
Dimethyl Formamide ◽  
New Synthesis ◽  
Convenient Synthesis

A convenient synthesis of DL-hydroxy-ornithine is described. Starting from diethyl allylmalonate, it involves treatment with sulphuryl chloride followed by hydrolysis and distillation to give a 90% yield of 2,5-dichloro-4-valerolactone. Condensation of this with two equivalents of potassium phthalimide in dimethyl-formamide gives a quantitative yield of crude 2,5-diphthalimido-4-valerolactone. This lactone is converted quantitatively by acid hydrolysis to DL-γ-hydroxyornithine, isolated as the dihydrochloride of the corresponding 2,5-diamino-4-valerolactone. The over-all yield calculated from allyl chloride is 80%.

Tandem Carbon-Radical Peroxidation−Addition to Carbonyl Groups Reaction. A New Synthesis of Steroidal β-Peroxy Lactones

1996 ◽  
Vol 61 (26) ◽  
pp. 9635-9635
Author(s):  
Alicia Boto ◽  
Rosendo Hernández ◽  
Ernesto Suárez ◽  
Carmen Betancor ◽  
María S. Rodríguez
Keyword(s):  
Carbonyl Groups ◽  
New Synthesis

1,3-Selenaphospholes: A New Synthesis from 1,2,3-Selenadiazoles and Kinetically Stabilized Phosphaalkynes1

Synlett ◽  
1991 ◽  
Vol 1991 (04) ◽  
pp. 356-358 ◽  
Author(s):  
Bernd Burkhart ◽  
Steffen Krill ◽  
Yoshinori Okano ◽  
Wataru Ando ◽  
Manfred Regitz
Keyword(s):  
New Synthesis

A New Synthesis and Analysis of Silica Nanowire Periodically Wrapped by Nano-spheres

2016 ◽  
Vol 31 (5) ◽  
pp. 523
Author(s):  
MA Hong-Bing ◽  
BAI Hua ◽  
XUE Chen ◽  
TAO Peng-Fei ◽  
XU Qun-Feng ◽  
...  
Keyword(s):  
New Synthesis
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