Chemistry of the Podocarpaceae. XXI. Preparation of 3-oxo derivatives of 12-Methoxy-18,19-bisnorpodocarpa-4,8,11,13-tetraene and 18,19-Bisnorabieta-4,8,11,13-tetraene

1969 ◽  
Vol 22 (8) ◽  
pp. 1711 ◽  
Author(s):  
CR Bennett ◽  
RC Cambie ◽  
RA Franich ◽  
TJ Fullerton
Keyword(s):  
Benzylidene Derivative ◽  
Derivatives Of

12-Methoxypodocarpa-8,11,13-trien-19-oic acid (11) has been converted into the 3-oxo compound (XX) via the C 3 benzylidene derivative of 12- methoxy-18,19. bisnor-5β-podocarpa-8,11,13-trien-4-one (VIII). The route follows a modification of a sequence used by Zeiss and Martin to convert abieta-8,11,13-trien-18-oic acid (III) into a tricyclic steroid analogue. The latter conversion has been reinvestigated and modified to give a higher yield of 18,19-bisnorabieta-4,8,11,13-tetraen-3-one (XXI).

THE SYNTHESIS OF 3-O-β-D-XYLOPYRANOSYL-D-XYLOSE AND THE RECHARACTERIZATION OF SOME BENZYLIDENE DERIVATIVES OF D-XYLOSE

1960 ◽  
Vol 38 (8) ◽  
pp. 1305-1315 ◽  
Author(s):  
E. J. C. Curtis ◽  
J. K. N. Jones
Keyword(s):  
Partial Hydrolysis ◽  
Benzylidene Derivative ◽  
Derivatives Of

The benzylidene groups of the di-O,O-benzylidene derivative of D-xylose diethyl dithioacetal have been located at the 2,4:3,5 positions, and not at the 2,3:4,5 positions suggested by Zinner, Rembarz, Linke, Ulbricht. Partial hydrolysis yielded the 2,4-O-benzylidene compound, from which 3-O-β-D-xylopyranosyl-D-xylose (rhodymenabiose) was prepared.

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

Diorganyl Derivatives of Tellurium(IV) (σ-Telluranes of R 2 TeX 2 Type)

2002 ◽  
Vol 23 (2) ◽  
pp. 125-207 ◽  
Author(s):  
Igor D. Sadekov ◽  
Alexander V. Zakharov ◽  
Alexander A. Maksimenko
Keyword(s):  
Derivatives Of

Hindered rotation around the amide bond in a series of derivatives of 2-acetamidothiophenes

1991 ◽  
Vol 88 ◽  
pp. 689-707 ◽  
Author(s):  
P Andriamadio ◽  
D Nicole ◽  
A Cartier ◽  
M Wierzbicki ◽  
G Kirsch
Keyword(s):  
Amide Bond ◽  
Hindered Rotation ◽  
Derivatives Of
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