Unprecedented Rearrangement of a 4-Alkoxy-5-bromoalk-2-en-1-ol to a Cyclopentenone via an Iso-Nazarov Cyclization Process
摘要:
We report the structure determination of the product 9 of the rearrangement of the allylic alcohol 3 under very mild conditions, probably promoted by an acidic substance, and propose a reasonable mechanism for its formation.
The evaluation of dicyclopentadienylsamarium as a reagent in organic synthesis
作者:J.L. Namy、J. Collin、J. Zhang、H.B. Kagan
DOI:10.1016/s0022-328x(00)99769-9
日期:1987.7
SmCp2, which is easily prepared from SmI2, has been screened as a reducing agent for organic chemistry. In particular, SmCp2 promotes the pseudo-Barbier reaction between carbonylcompounds (aldehydes and ketones) and aliphatic or allylic halides more efficiently than does SmI2.
substituent to a metal catalyst en route to carbon-carbon bondformation. Kischkewitz et al. report a metal-free alternative pathway, wherein the boron stays bound to one end of the olefin while a carbon radical attacks the other end. Charge transfer then prompts migration of an alkyl or aryl group from the boron to form a second carbon-carbon bond. The boron can subsequently be displaced, generating a
Fe(III)‐Catalyzed Aerobic Oxidation of 1,4‐Diols<sup>†</sup>
作者:Junlin Li、Jinxian Liu、Chunling Fu、Shengming Ma
DOI:10.1002/cjoc.202200768
日期:2023.8.15
Aerobic oxidation has been catching more and more attention because of its atom economy and environmental friendliness. Oxidation of diols is a challenge due to various oxidative products. Thus, highly selective aerobic oxidation affording specific products is of current interest. In this work, a combination of Fe(NO3)3·9H2O/TEMPO/KCl catalysis has been identified as an efficient recipe for the aerobic