Results 141 to 150 of about 8,991 (150)

Palladium-Catalyzed [3 + 2] Cycloaddition of 4-Vinyl-4-Butyrolactones with Alkenes: Synthesis of Spirocyclopentane Compounds

The Journal of Organic Chemistry
A palladium-catalyzed [3 + 2] cycloaddition of 4-vinyl-4-butyrolactones (VBLs) with alkenes has been developed to afford various spirocyclopentane products in high yields with excellent diastereoselectivities. The scale-up reaction and further derivations of the product worked well, demonstrating the potential application of the current reaction in ...
Honghao Sun, Aoran Song, Shuang Gu, Yi Tang, Sen Yang, Wenhui Li, Hongchao Guo   +6 more
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ChemInform Abstract: ABSOLUTE CONFIGURATION OF AROMATIC OXYGENATED ISOPRENOID DERIVATIVES, FORMATION OF 3‐HYDROXY‐4,4‐DIMETHYL‐4‐BUTYROLACTONE BY OZONOLYSIS AND A STUDY OF ITS STEREOCHEMISTRY

Chemischer Informationsdienst, 1973
AbstractOzonolyse des Platydesminiummetho‐Salzes (I) liefert das Butyrolacton (IIa), dessen Struktur durch asymm. Synthese des Esters (IIb) aus dem Ester (III) über das Epoxid (IV) bestätigt wird.
J. F. COLLINS, M. F. GRUNDON
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Palladium-Catalyzed [5 + 4] Cycloaddition of 4-Vinyl-4-Butyrolactones with N-Tosyl Azadienes: Construction of Nine-Membered Ring

The Journal of Organic Chemistry
In this paper, we reported the palladium-catalyzed formal [5 + 4] cycloaddition reactions between 4-vinyl-4-butyrolactones (VBLs) and azadienes. Under mild reaction conditions, a wide range of benzofuran-fused 9-membered heterocyclic compounds had been provided in moderate to excellent yields with exclusive regioselectivities and excellent ...
Lan Wang, Sen Yang, Yi Tang, Kuan Li, Mengxi Lu, Hongchao Guo   +5 more
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Palladium-catalyzed [3 + 2] cycloaddition of 4-vinyl-4-butyrolactones with sulfamate-derived cyclic imines: construction of sulfamate-fused pyrrolidines

Organic & Biomolecular Chemistry
The palladium-catalyzed [3 + 2] decarboxylative cycloaddition of 4-vinyl-4-butyrolactones with sulfamate-derived cyclic imines has been developed, providing the sulfamate-fused pyrrolidine derivatives in high yields with good diastereoselectivities.
Honghao Sun, Siyuan Ding, Bo Wang, Jiaxing Huang, Hongchao Guo   +4 more
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Palladium-Catalyzed [3 + 2] Cycloaddition of 4-Vinyl-4-butyrolactones with Ketenes Generated in Situ from Acyl Chlorides: A Method for the Synthesis of Dihydrofurans

Organic Letters
In this paper, palladium-catalyzed [3 + 2] cycloaddition of 4-vinyl-4-butyrolactones with ketenes generated from easily available acyl chlorides was achieved. With Pd2(dba)3·CHCl3/XantPhos as the catalyst, the reaction proceeded smoothly under mild reaction conditions, affording a series of 2,3-dihydrofurans in moderate to high yields.
Yujie Dong, Sen Yang, Yi Tang, Kuan Li, Jun Liu, Fazhou Yang, Cheng Zhang, Hongchao Guo   +7 more
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ChemInform Abstract: (Solid + Liquid) Phase Equilibria and Solid‐Compound Formation in Tetrachloromethane + Cyclopentanone, + 4‐Butyrolactone, and + 1‐Methyl‐2‐pyrrolidinone.

Chemischer Informationsdienst, 1986
G. CHE, J. B. OTT, J. R. GOATES
openaire   +1 more source

[4-Butyrolactone and cell permeability].

Comptes rendus des seances de la Societe de biologie et de ses filiales, 1966
A, Cier, M, Riotte, M, Jouvet, M, Schmitt, P, Duca   +4 more
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[4-BUTYROLACTONE AND PYRIDOXINE DEFICIENCY IN THE RAT].

Comptes rendus des seances de la Societe de biologie et de ses filiales, 1996
A, CIER, M, JOUVET, S, DUBROCARD, F, MICHEL   +3 more
openaire   +1 more source

[Variations of cerebral biogenic amines after injection of 4-butyrolactone].

Comptes rendus des seances de la Societe de biologie et de ses filiales, 1972
J, Nouaille-Degorce, M, Riotte, B, Barras, Y, Pegon, A, Cier   +4 more
openaire   +1 more source

[Effect of sodium 4-hydroxybutyrate and 4-butyrolactone on cat EEG and behavior].

Comptes rendus des seances de la Societe de biologie et de ses filiales, 1998
M, JOUVET, A, CIER, D, MOUNIER, J L, VALATX   +3 more
openaire   +1 more source