ChemInform Abstract: PREPARATION OF Δ5-7-OXO STEROIDS BY ALLYLIC OXIDATION OF Δ5 STEROIDS: A STUDY OF THE REACTIVITY OF THE CHROMIUM TRIOXIDE-PYRIDINE 1:1 AND 1:2 COMPLEXES PREPARED IN SITU

1979 ◽  
Vol 10 (28) ◽  
Author(s):  
E. MAPPUS ◽  
C.-Y. CUILLERON
Keyword(s):  
Chromium Trioxide ◽  
Allylic Oxidation

Allylic oxidation with 3,5-dimethylpyrazole. Chromium trioxide complex steroidal .DELTA.5-7-ketones

1978 ◽  
Vol 43 (10) ◽  
pp. 2057-2059 ◽  
Author(s):  
William G. Salmond ◽  
Mary A. Barta ◽  
Jeffrey L. Havens
Keyword(s):  
Chromium Trioxide ◽  
Allylic Oxidation

scholarly journals Towards an atomistic understanding of electrocatalytic partial hydrocarbon oxidation: propene on palladium

2019 ◽  
Vol 12 (3) ◽  
pp. 1055-1067 ◽  
Author(s):  
Anna Winiwarter ◽  
Luca Silvioli ◽  
Soren B. Scott ◽  
Kasper Enemark-Rasmussen ◽  
Manuel Sariç ◽  
...  
Keyword(s):  
Catalyst Surface ◽  
Allylic Oxidation ◽  
Hydrocarbon Oxidation ◽  
High Coverage

High coverage of the catalyst surface generated by in situ degradation of propene steers the reaction towards allylic oxidation.

Correction. Allylic Oxidation of Olefins with Chromium Trioxide-Pyridine Complex

1971 ◽  
Vol 36 (23) ◽  
pp. 3657-3657
Author(s):  
William Dauben ◽  
Milton Lorber ◽  
Dwight Fullerton
Keyword(s):  
Chromium Trioxide ◽  
Allylic Oxidation ◽  
Pyridine Complex ◽  
Oxidation Of Olefins

Constituents of Solidago Species. Part V. Non-acidic Diterpenoids from Solidago gigantea var. serotina

1973 ◽  
Vol 51 (9) ◽  
pp. 1346-1358 ◽  
Author(s):  
M. S. Henderson ◽  
R. McCrindle ◽  
D. McMaster
Keyword(s):  
Total Synthesis ◽  
Related Compound ◽  
Chromium Trioxide ◽  
Allylic Oxidation ◽  
Spectroscopic Evidence ◽  
Solidago Gigantea ◽  
Pyridine Complex ◽  
Related Compounds ◽  
Leonotis Leonurus

Eight new furan-containing diterpenoids from Solidago gigantea Ait. var. serotina (Kuntze) Cronqu., are formulated as 1c–g, 2, 3a, and 4a on the basis of chemical and spectroscopic evidence and by correlation with solidagoic acid A of previously defined constitution and stereochemistry. The structure (5a) of a ninth related compound is tentatively assigned. The allylic oxidation of some of these new diterpenoids and related compounds with the chromium trioxide – pyridine complex is reported. In the course of this investigation of formal total synthesis of compound Y from Leonotis leonurus was achieved.

Allylic oxidation of olefins with chromium trioxide pyridine complex

1969 ◽  
Vol 34 (11) ◽  
pp. 3587-3592 ◽  
Author(s):  
William G. Dauben ◽  
Milton E. Lorber ◽  
Dwight S. Fullerton
Keyword(s):  
Chromium Trioxide ◽  
Allylic Oxidation ◽  
Pyridine Complex ◽  
Oxidation Of Olefins

A stereocontrolled intramolecular cycloaddition – sigmatropic rearrangement approach to a tricyclo[7.4.01,6.01,10]tridecane precursor for (±) gascardic acid

1991 ◽  
Vol 69 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Gervais Bérubé ◽  
Alex G. Fallis
Keyword(s):  
Key Words ◽  
Potassium Salt ◽  
Sigmatropic Rearrangement ◽  
Diels Alder ◽  
Allylic Oxidation ◽  
Intramolecular Cycloaddition ◽  
Fused Ring ◽  
In Situ Generation ◽  
Acid Precursor

A general intramolecular Diels–Alder anionic oxy-Cope strategy for the synthesis of tricyclic skeletons and its application to the preparation of the gascardic acid precursor 21 is described. In situ generation of the appropriate cyclopentadiene 9 by isomerization (Et3N) afforded the [4+2] adduct directly or with EtAlCl2 as catalyst. The requisite potassium salt of the 1,5 diene 16 rearranged with concomitant epimerization at 67 °C to the fused ring ketone 18. Selective allylic oxidation and reduction provided 21. Key words: Diels–Alder, oxy-Cope, sesterterpene, synthesis, cycloaddition.

STEROIDAL ALLYLIC OXIDATION WITH CHROMIUM TRIOXIDE IN THE PRESENCE OF PYRAZOLE

1985 ◽  
Vol 17 (3) ◽  
pp. 192-194 ◽  
Author(s):  
Edward J. Parish ◽  
Sarawanee Chitrakorn ◽  
Kenneth L. Todd
Keyword(s):  
Chromium Trioxide ◽  
Allylic Oxidation
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