The 2- and 3-C-Methyl Derivatives of Methyl 2,3-Dideoxy-α-D-erythro-hex-2-enopyranosid-4-ulose

1975 ◽  
Vol 53 (13) ◽  
pp. 2017-2023 ◽  
Author(s):  
David Roy Hicks ◽  
Bert Fraser-Reid
Keyword(s):  
Organometallic Reagents ◽  
Methyl Derivatives ◽  
High Yields ◽  
Derivatives Of

The oxirane rings of carbohydrate 2,3-anhydro sugars are opened stereospecifically by lithium dimethyl cuprate. These reactions go in high yields, without the formation of abberant side products encountered with other organometallic reagents. The alcohols produced are converted via their xanthate esters to olefins in good overall yields. The latter on hydrolysis and oxidation give the title enones.

Reaction of 5-Chloroalkyl-3-phenyl-4,5-dihydroisoxazoles with strong base. An unexpected new synthesis of the 2-Oxa-3-azabicyclo[3,1,0]hex-3-ene ring system

1977 ◽  
Vol 30 (8) ◽  
pp. 1855 ◽  
Author(s):  
TG Burrowes ◽  
WR Jackson ◽  
S Faulks ◽  
I Sharp
Keyword(s):  
Ring System ◽  
Dimethyl Sulphoxide ◽  
High Yield ◽  
Strong Base ◽  
Bicyclic Compounds ◽  
New Synthesis ◽  
Bicyclic System ◽  
Methyl Derivatives ◽  
High Yields ◽  
Derivatives Of

Reaction of 5-chloromethyl-3-phenyl-4,5-dihydroisoxazole with potassium t-butoxide in dimethyl sulphoxide gives 4-phenyl-2-oxa-3- azabicyclo[3,1,0]hex-3-ene in high yield and reaction of the 5-(1?- chloroethyl) homologue gives high yields of the diastereoisomeric 6- methyl derivatives of the bicyclic system. Some unsuccessful attempts to convert these bicyclic compounds into substituted cyclo-propanols and cyclopropenes are described.

2,3-(1′-Pyrazolino-3′,4′) hexopyranosides and their products of decomposition

1978 ◽  
Vol 56 (24) ◽  
pp. 3087-3095 ◽  
Author(s):  
Hans H. Baer ◽  
Friedrich Linhart ◽  
Hanna R. Hanna
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Silica Gel ◽  
Optical Rotatory Dispersion ◽  
Optical Rotatory ◽  
Dispersion Data ◽  
Methyl Derivatives ◽  
High Yields ◽  
Derivatives Of ◽  
Methylene Derivative

The methyl 4,6-O-benzylidene-2,3-dideoxy-3-nitrohex-2-enopyranosides having the β-D-erythro (1), α-D-erythro (2), β-D-threo (3), and α-D-threo (4) configurations reacted with diazomethane to give high yields of 2,3-(1′-pyrazolino-3′,4′) derivatives (5–8). The pyrazolines 5 and 6 (from 1 and 2) were deduced on the basis of nuclear magnetic resonance and optical rotatory dispersion data to possess the β- and α-D-gluco configurations, and 7 and 8 (from 3 and 4), to have the β- and α-D-ido configurations, respectively. Thermolysis of 5, 6, and 8 led to the methyl-branched, nitroolefinic glycosides 9, 10, and 11 (the 2-C-methyl derivatives of 1, 2, and 4), whereas 7 afforded the corresponding 2,3-C-methylene derivative 12, a cyclopropano sugar. The α-anomeric cyclopropano derivative 13 was obtained from 8 by decomposition on silica gel.

Physical Properties of TCNQ Salts with N-Methyl Derivatives of Pyridine

1982 ◽  
Vol 85 (1) ◽  
pp. 257-263 ◽  
Author(s):  
A. Graja ◽  
M. Przybylski ◽  
B. Butka ◽  
R. Swietlik
Keyword(s):  
Physical Properties ◽  
Methyl Derivatives ◽  
Derivatives Of

Methyl derivatives of furan

1974 ◽  
Vol 39 (11) ◽  
pp. 3109-3116 ◽  
Author(s):  
J. Šrogl ◽  
M. Janda ◽  
I. Stibor ◽  
V. Skála ◽  
P. Trška ◽  
...  
Keyword(s):  
Methyl Derivatives ◽  
Derivatives Of

O'-Methyl derivatives of arabinosylcytosine

1972 ◽  
Vol 46 (4) ◽  
pp. 1734-1741 ◽  
Author(s):  
E. Darżynkiewicz ◽  
J.T. Kuśmierek ◽  
D. Shugar
Keyword(s):  
Methyl Derivatives ◽  
Derivatives Of

ESR SPECTRA AND STRUCTURE OF RADICAL ANIONS OF METHYL DERIVATIVES OF STANNANE

1980 ◽  
Vol 9 (6) ◽  
pp. 611-612 ◽  
Author(s):  
Akinori Hasegawa ◽  
Takatoshi Yamaguchi ◽  
Michiro Hayashi
Keyword(s):  
Esr Spectra ◽  
Radical Anions ◽  
Methyl Derivatives ◽  
Derivatives Of
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