Lewis acid induced tandem carbocationic ring opening and cyclizations of α-[bis(methylthio)methylene]ethyl-2-styrylcyclopropyl ketones and carbinols: Novel approach to bicyclo[3.3.0]octene and cyclopent[a]indene frameworks

Tetrahedron ◽  
1998 ◽  
Vol 54 (3-4) ◽  
pp. 531-540 ◽  
Author(s):  
Pranab K Patra ◽  
V Sriram ◽  
H Ila ◽  
H Junjappa
Keyword(s):  
Lewis Acid ◽  
Ring Opening ◽  
Novel Approach

scholarly journals Imidazolinium and amidinium salts as Lewis acid organocatalysts

2012 ◽  
Vol 8 ◽  
pp. 1798-1803 ◽  
Author(s):  
Oksana Sereda ◽  
Nicole Clemens ◽  
Tatjana Heckel ◽  
René Wilhelm
Keyword(s):  
Lewis Acid ◽  
Ring Opening ◽  
Alder Reaction ◽  
Diels Alder ◽  
Diels Alder Reaction

The application of imidazolinium and amidinium salts as soft Lewis acid organocatalysts is described. These salts were suitable catalysts for the activation of unsaturated thioesters in a Diels–Alder reaction and in the ring opening of thiiranes and epoxides. The products were isolated in good yields. The mild catalysts did not cause desulfurization of the products containing a thiol or thiocarbonyl group.

Regioselective synthesis of functionalized dihydroisoquinolines from o-alkynylarylaldimines via the Reformatsky reaction

2016 ◽  
Vol 14 (41) ◽  
pp. 9896-9906 ◽  
Author(s):  
Tohasib Yusub Chaudhari ◽  
Urvashi Urvashi ◽  
Sandeep K. Ginotra ◽  
Pooja Yadav ◽  
Gulshan Kumar ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Regioselective Synthesis ◽  
Reformatsky Reaction ◽  
Novel Approach ◽  
The Reformatsky Reaction

A novel approach for the synthesis of functionalized 1,2-dihydroisoquinolines from o-alkynylarylaldimines via the Reformatsky reaction without the aid of an external Lewis acid has been described.

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