Hypoiodous acid-catalyzed regioselective geminal addition of methanol to vinylarenes: synthesis of anti-Markovnikov methyl acetals
作者:Swamy Peraka、Naresh Mameda、Mahender Reddy Marri、Srujana Kodumuri、Durgaiah Chevella、Prabhakar Sripadi、Narender Nama
DOI:10.1039/c5ra16826k
日期:——
salt and oxone is reported. The preliminary mechanistic investigations suggest that the key factor for achieving the anti-Markovnikov regioselectivity is the semipinacol rearrangement of an iodo functionalized intermediate, which is confirmed by an isotope labeling experiment. In addition, the reaction involves the de-iodination of a co-iodo intermediate via its oxidation to hypervalent iodine species
A generalized approach for iron catalyzed chemo- and regioselective formation of anti-Markovnikov acetals from styrene derivatives
作者:Abhishek Dutta Chowdhury、Goutam Kumar Lahiri
DOI:10.1039/c2cc17889c
日期:——
in the presence of pyridine-2,6-dicarboxylic acid and PhI(OAc)(2) can efficiently catalyze the formation of chemoselective dialkyl acetals from styrene derivatives with anti-Markovnikovregioselectivity in good to high yields under mild and benign reaction conditions.
Highly Selective One-Pot Synthesis of Polysubstituted Isoflavanes using Styryl Ethers and Electron-Withdrawing ortho-Quinone Methides Generated In Situ
highly selective one-potsynthesis of polysubstituted isoflavanes has been developed. The reaction proceeds through the cycloaddition of methyl styryl ethers, derived from phenylacetaldehyde dimethyl acetals under acidic conditions, with electron-withdrawing ortho-quinone methides generated in situ. When phenylacetaldehyde dimethyl acetals were reacted with salicylaldehydes, the reaction proceeded smoothly
作者:Nicholas D. J. Yates、Saeed Akkad、Amanda Noble、Tessa Keenan、Natasha E. Hatton、Nathalie Signoret、Martin A. Fascione
DOI:10.1039/d2gc02292c
日期:——
We present catalyst-free “green” site-selective protein bioconjugations that utilise aldol condensations and are compatible with click chemistries, and construct a nanobody-derived bioconjugate capable of selectively labelling prostate cancer cells.