Organocatalytic enantioselective synthesis of phthalans via Wittig/
<scp>oxa‐Michael</scp>
cascade reaction
作者:Eun Chae Son、Jaeeun No、Sung‐Gon Kim
DOI:10.1002/bkcs.12402
日期:2021.11
An enantioselective synthetic method for 1-substituted phthalans has been developed. The organocatalytic reaction between 1,3-dihydro-2-benzofuran-1-ols and Wittig reagents using cinchona squaramide-based organocatalyst proceeded with sequential Wittig reaction followed by an enantioselective intramolecular oxa-Michael reaction, yielding enantioenriched phthalans with moderate to good enantioselectivities
Intramolecular Oxa-Mannich Reaction of 1,3-Dihydro-2-benzofuran-1-ol for Efficient Synthesis of 1-Aminophthalan Derivatives
作者:Kim, Heebum、Kim, Sung-Gon
DOI:10.5012/jkcs.2022.66.1.9
日期:——
An efficient method for the synthesis of 1-aminophthalans has been developed. The intramolecular oxa-Mannich reaction of 1,3-dihydro-2-benzofuran-1-ols with p-toluenesulfonylamine in the presence of Cs2CO3 as a base, without using any catalyst, provided the desired 1-aminophthalans in moderate to good yields.
Dual Fluorescent <i>N</i>-Aryl-2,3- naphthalimides: Applications in Ratiometric DNA Detection and White Organic Light-Emitting Devices
作者:Premchendar Nandhikonda、Michael D. Heagy
DOI:10.1021/ol101760m
日期:2010.11.5
A ten element matrix of 5- and 6-substituted-(2,3)-naphthalimides was prepared for the appropriate placement of substituents necessary to promote dual fluorescence (DF). As prescribed by our balanced seesaw photophysical model this matrix yielded nine new DF dyes out of a possible ten compounds. From this set of nine DF dyes, 4-fluoronaphthalic amide (37) was selected as a probe for ratiometric detection of DNA and demonstration of panchromatic emission.