551-41-7Relevant articles and documents
Fe-catalyzed Fukuyama-type indole synthesis triggered by hydrogen atom transfer
Huang, Hanmin,Yu, Min,Zhang, Tianze
, p. 10501 - 10505 (2021/08/20)
Fe, Co, and Mn hydride-initiated radical olefin additions have enjoyed great success in modern synthesis, yet the extension of other hydrogen radicalophiles instead of olefins remains largely elusive. Herein, we report an efficient Fe-catalyzed intramolec
Scope and mechanism of direct indole and pyrrole couplings adjacent to carbonyl compounds: Total synthesis of acremoauxin A and oxazinin 3
Richter, Jeremy M.,Whitefield, Brandon W.,Maimone, Thomas J.,Lin, David W.,Castroviejo, M. Pilar,Baran, Phil S.
, p. 12857 - 12869 (2008/09/16)
Full details are provided for a recently invented method to couple indoles and pyrroles to carbonyl compounds. The reaction is ideally suited for structurally complex substrates and exhibits high levels of chemoselectivity (functional group tolerability), regioselectivity (coupling occurs exclusively at C-3 of indole or C-2 of pyrrole), stereoselectivity (substrate control), and practicality (amenable to scaleup). In addition, quaternary stereocenters are easily and predictably generated. The reaction has been applied to a number of synthetic problems including total syntheses of members of the hapalindole family of natural products, ketorolac, acremoauxin A, and oxazinin 3. Mechanistically, this coupling protocol appears to operate by a single electron-transfer process requiring generation of an electron-deficient radical adjacent to a carbonyl which is then intercepted by an indole or pyrrole anion.
Direct coupling of indoles with carbonyl compounds: Short, enantioselective, gram-scale synthetic entry into the hapalindole and fischerindole alkaloid families
Baran, Phil S.,Richter, Jeremy M.
, p. 7450 - 7451 (2007/10/03)
The invention of a method for the direct union of indoles and carbonyl compounds (ketones, amides, esters) is described. Using this new method, a short, enantioselective, gram-scale and protecting group-free synthetic entry to the fischerindole and hapali