Catalyst-free construction of spiro [benzoquinolizidine-chromanones] via a tandem condensation/1,5-hydride transfer/cyclization process

2020 ◽  
Vol 18 (43) ◽  
pp. 8839-8843
Author(s):  
Siyuan Liu ◽  
Hang Wang ◽  
Baomin Wang
Keyword(s):  
Hydride Transfer ◽  
Catalyst Free ◽  
Highly Efficient ◽  
Hydride Shift ◽  
Cyclization Process ◽  
Free Construction

A highly efficient and quite mild protocol to achieve spiro [benzoquinoline-chromanones] through a catalyst-free condensation/[1,5]-hydride shift/6-endo cyclization sequence was developed.

A tandem annulation with a [1,3]-hydride transfer as the key step leading to isochromans

2017 ◽  
Vol 53 (77) ◽  
pp. 10652-10655 ◽  
Author(s):  
Yingwei Wang ◽  
Guangxun Li ◽  
Hongxin Liu ◽  
Zhuo Tang ◽  
Yuan Cao ◽  
...  
Keyword(s):  
Hydride Transfer ◽  
Cyclization Process

The first [1,3]-hydride transfer/cyclization process for oxacarbenium isomerization.

Highly efficient and catalyst-free synthesis of substituted thioureas in water

2011 ◽  
Vol 15 (3) ◽  
pp. 809-815 ◽  
Author(s):  
Shi-Feng Gan ◽  
Jie-Ping Wan ◽  
Yuan-Jiang Pan ◽  
Cui-Rong Sun
Keyword(s):  
Catalyst Free ◽  
Highly Efficient

Expedient Synthesis of 1,4‐Benzodiazepines via a Tandem Condensation/[1,5]‐Hydride Transfer/Cyclization Process

2018 ◽  
Vol 360 (21) ◽  
pp. 4094-4098 ◽  
Author(s):  
Siyuan Liu ◽  
Tuan Zhao ◽  
Jingping Qu ◽  
Baomin Wang
Keyword(s):  
Hydride Transfer ◽  
Cyclization Process

Intermolecular Cyclopropanation of Iodonium Ylides and Electron-Deficient Alkenes through a Highly Efficient Catalyst-Free Process

2018 ◽  
Vol 7 (10) ◽  
pp. 2065-2068 ◽  
Author(s):  
Xiang Zhang ◽  
Rong Zeng ◽  
Xin Feng ◽  
Qing-Song Dai ◽  
Yue Liu ◽  
...  
Keyword(s):  
Efficient Catalyst ◽  
Catalyst Free ◽  
Highly Efficient ◽  
Free Process ◽  
Iodonium Ylides

FLP behaviour of cationic titanium complexes with tridentate Cp,O,N-ligands: highly efficient syntheses and activation reactions of C–X bonds (X = Cl, F)

2019 ◽  
Vol 48 (4) ◽  
pp. 1516-1523 ◽  
Author(s):  
Malte Fischer ◽  
Kevin Schwitalla ◽  
Svenja Baues ◽  
Marc Schmidtmann ◽  
Ruediger Beckhaus
Keyword(s):  
Michael Reaction ◽  
Titanium Complexes ◽  
Catalyst Free ◽  
Highly Efficient ◽  
Convenient Synthesis ◽  
Ligand Precursors

Titanium FLPs! Solvent- and catalyst-free Aza-Michael reaction provides β-amino ketones which were employed as ligand precursors for the convenient synthesis of novel cationic titanium complexes with tridentate Cp,O,N-ligand frameworks, which activate C–X bonds in a FLP-like manner.

scholarly journals On water catalyst-free synthesis of benzo[d]imidazo[2,1-b] thiazoles and novel N-alkylated 2-aminobenzo[d]oxazoles under microwave irradiation

RSC Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 770-778 ◽  
Author(s):  
Narasimharao Mukku ◽  
Barnali Maiti
Keyword(s):  
Microwave Irradiation ◽  
Microwave Assisted ◽  
Catalyst Free ◽  
Highly Efficient

A highly efficient unprecedented catalyst-free microwave-assisted procedure for synthesizing benzo[d]imidazo[2,1-b]thiazoles and N-alkylated 2-aminobenzo[d]oxazol in green media was developed.

Evidence for a Hydride Shift in the Alkaline Rearrangements of D-Ribose

1971 ◽  
Vol 49 (9) ◽  
pp. 1433-1440 ◽  
Author(s):  
W. B. Gleason ◽  
R. Barker
Keyword(s):  
Small Proportion ◽  
Hydride Transfer ◽  
Aqueous Alkali ◽  
Hydride Shift ◽  
Presence And Absence

The synthesis of D-ribose-2-t from D-arabinose is described and its conversions in aqueous alkali in the presence and absence of oxygen reported. In both situations a significant amount of label is transferred from C-2 to -1 and a relatively small proportion is released to the solvent. It is concluded that hydride transfer is occurring and that enolization, which requires the loss of hydrogen from C-2, is not an obligatory first step in base-catalyzed rearrangements of D-ribose.

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