Oxidation of pyrrole α-methyl to methoxymethyl with ceric triflate
作者:Thomas Thyrann、David A. Lightner
DOI:10.1016/0040-4039(95)02161-2
日期:1996.1
Pyrroleα-methyl methyl ethers can be prepared in high yield by oxidation of pyrroleα-methyl groups with cerictriflate in methanol when the pyrrole ring also has an α-carboxylic acid ester group, and high yields of dipyrrylmethanes may be obtained in a one-pot oxidation-solvolysis reaction.
An inexpensive, selective procedure for oxidizing α-methyl to α-formyl pyrroles pavel bobal
作者:David A. Lightner
DOI:10.1002/jhet.5570380531
日期:2001.9
α-Methylpyrroles are converted to α-formyl by sodium bromate in aqueous methanol in ∼60% yield. Adding 1% ceric ammonium nitrate as a co-oxidant brings the isolated yields of synthetically useful 2-formylpyrroles 2a-d up to ∼70%, or close to those found when using only the considerably more expensive ceric ammonium nitrate as oxidant.