1998
DOI: 10.1007/bf02317809
|View full text |Cite
|
Sign up to set email alerts
|

Mutual catalytic conversions of unsubstituted furan and pyran systems

Abstract: The conversions of furan, di-and tetrahydrofuran, and di-and tetrahydropyran on a molybdenum catalyst in a hydrogen atmosphere have been investigated. The studied cyclic systems readily undergo mutual conversions at 125-215"C and also undergo a hydrogenation-dehydrogenation reaction. Expansion of the unsubstituted furan rings to pyran without the introduction into the reaction medium of components capable of generating methyl radicals are described by us for the first time.The chemistry of the simplest oxygen … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

0
11
0

Year Published

2009
2009
2019
2019

Publication Types

Select...
4

Relationship

0
4

Authors

Journals

citations
Cited by 4 publications
(11 citation statements)
references
References 7 publications
0
11
0
Order By: Relevance
“…5(B) [4], where a i is, in turn, the sum of all the decomposition rate coefficients of the ion i (i = 1, 2, 3 or 4) which are different from those of reversible steps of Scheme 2(A), i.e. a 1 = k 5 + k 6 , a 2 = k 7 + k 8 + k 9 , a 3 = k 10 + k 11 , and a 4 = k 12 + k 13 + k 14 . Here, the various rate coefficients a 1 , a 2 , a 3 and a 4 are treated as irreversible processes.…”
Section: Conformations Of the Molecular Ions Of E-24-pentadienal Andmentioning
confidence: 99%
See 1 more Smart Citation
“…5(B) [4], where a i is, in turn, the sum of all the decomposition rate coefficients of the ion i (i = 1, 2, 3 or 4) which are different from those of reversible steps of Scheme 2(A), i.e. a 1 = k 5 + k 6 , a 2 = k 7 + k 8 + k 9 , a 3 = k 10 + k 11 , and a 4 = k 12 + k 13 + k 14 . Here, the various rate coefficients a 1 , a 2 , a 3 and a 4 are treated as irreversible processes.…”
Section: Conformations Of the Molecular Ions Of E-24-pentadienal Andmentioning
confidence: 99%
“…Theoretical calculations at the B3LYP/6-31G(d,p) level have provided highquality results for pericyclic reactions of 2,4-pentadienal, with molecular structures and activation energies very similar to those obtained with sophisticated and computationally more expensive ab initio methods [QCISD(T) and MP4SDTQ], which, in turn, are acceptably consistent with the experimental estimates. [12] On the other hand, ring expansions of furan derivatives to pyran systems have been reported in both photochemical [13] and thermal [14] reactions of neutral species.…”
Section: Introductionmentioning
confidence: 99%
“…After a rapid 'equilibrium' has been established between [7] (Fig. 2(A)), the heterocyclic ring of the bicyclic intermediate [7] (Figs 2(A) and 4(E)).…”
Section: Isomerization Of 2-methylfuran Molecular Ionmentioning
confidence: 99%
“…The first step of the rearrangement of [1] + potential energy surface and can be rapidly stabilized through either the single-step ring-expansion leading to 2H-pyran ion [6] +• or two-step ring-expansion leading to 3H-pyran ion [4] +• involving the high-energy intermediate [7] +• (Fig. 2(A)).…”
Section: Isomerization Of 2-methylfuran Molecular Ionmentioning
confidence: 99%
See 1 more Smart Citation