Results 251 to 260 of about 43,907 (278)

Montmorillonite Clay Catalysis. VIII. Synthesis of Arylcholestenes by Friedelcrafts Reaction Catalysed by Montmorillonite K-10.

Synthetic Communications, 1998
Abstract A series of 3β-arylcholestenes were synthesised by Friedel-Crafts reaction of cholesterol with arenes catalysed by montmorillonite K-10. ∗∗ Visiting scholar from Department of Chemistry, Cangzhou Normal College.
Li-Jun Li, Bo Lu∗∗, Tong-Shuang Li, Ji-Tai Li   +3 more
openaire   +1 more source

ChemInform Abstract: Microwave‐Assisted Fries Rearrangement on K 10 Montmorillonite.

ChemInform, 1996
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
G. L. KAD, I. R. TREHAN, J. KAUR, S. NAYYAR, A. ARORA, J. S. BRAR   +5 more
openaire   +1 more source

Environmentally compatible C-glycosidation of glycals using montmorillonite K-10

Chemical Communications, 1996
The C-glycosidations of glycal acetates 1–4 with allyltrimethylsilane 5, vinyloxytrimethylsilane 6 or isopropenyl acetate 7 using montmorillonite K-10 as an environmentally acceptable and inexpensive industrial catalyst under mild conditions proceed effectively to give the corresponding 2,3-unsaturated C-glycosides in high yields.
Kazunobu Toshima, Naoki Miyamoto, Goh Matsuo, Masaya Nakata, Shuichi Matsumura   +4 more
openaire   +1 more source

Transesterification of β-ketoesters with alcohols catalyzed by montmorillonite K-10

Green Chemistry, 2002
Montmorillonite K-10 is an efficient reusable catalyst for the transesterification of ethyl/methyl β-ketoesters with various alcohols in good yields. The main advantages of the catalyst are easy operation in the workup and a more economical and environmentally benign procedure.
Tongshou Jin, Suling Zhang, Tongshuang Li   +2 more
openaire   +1 more source

Hydrogen transfer reduction of ketones catalyzed by Fluka K-10 montmorillonite

Journal of Molecular Catalysis A: Chemical, 1998
K-10 montmorillonite (Fluka) catalyzes the reduction of aliphatic and aromatic ketones by H-transfer in isopropanol under basic conditions (0.06 M KOH).
David Dolmazon, Raluca Aldea, Howard Alper   +2 more
openaire   +1 more source

ChemInform Abstract: Montmorillonite K‐10 and KSF as Remarkable Acetylation Catalysts.

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A.‐X. LI, T.‐S. LI, T.‐H. DING
openaire   +1 more source

Oxidation of Alcohols by Montmorillonite K-10 Supported Bis(trimethylsilyl)chromate

Monatshefte für Chemie / Chemical Monthly, 1998
Bis(trimethylsilyl)chromate generated from chromic anhydride and hexamethyldisiloxane in dichloromethane was applied onto a montmorillonite K-10 surface. This reagent proved to be suitable for oxidizing alcohols of various types to the corresponding carbonyl compounds..
Majid M. Heravi, Dariush Ajami, Kourosh Tabar-Heydar   +2 more
openaire   +1 more source

Montmorillonite Clay Catalysis. Part 15 Backbone Rearrangement of 4,4-Dialkylcholest-5-enes catalyzed by Montmorillonite K-10

Synthetic Communications, 1999
Abstract In the presence of montmorillonite K-10 4,4-dialkylcholest-5-enes undergo backbone rearrangement to give (20R)- and (20S)-4,4-dialkyl-5β,14β-dimethyl-18,19-dinor-8α,9β,10α-cholest-13(17)-enes in high yields.
Hui-Yun Duan, Jian-Xin Wang, Tong-Shuang Li   +2 more
openaire   +1 more source

An Expeditious Synthesis of Flavones on Montmorillonite K 10 Clay with Microwaves†‡

Journal of Chemical Research, 1998
A manipulatively simple and rapid method for the synthesis of flavones is described via a solid-state dehydrative cyclization of o-hydroxydibenzoylmethanes on a clay surface using microwaves.
Rajender S. Varma, Rajesh K. Saini, Dalip Kumar   +2 more
openaire   +1 more source

Montmorillonite K-10 Catalyzed Knoevenagel Condensation under Microwave Irradiation in Solventless System

Zeitschrift für Naturforschung B, 1999
Montmorillonite K-10 catalyzed efficiently the Knoevenagel condensation of carbonyl compounds with malonitrile and ethylcyanoacetate in dry media under microwave irradiation.
Majid M. Heravi, Mahmood Tajbakhsh, Bagher Mohajerani, Mitra Ghassemzadeh   +3 more
openaire   +1 more source