Catalytic and metal-free intramolecular hydroalkoxylation of alkynes
作者:Alexandre Jean、Jacques Rouden、Jacques Maddaluno、Michaël De Paolis、Jérôme Blanchet
DOI:10.1016/j.tetlet.2019.01.020
日期:2019.2
Benzyltrimethylammonium hydroxide act as an efficient metal-free catalyst for the intramolecular hydroalkoxylation of alkynes. Notably, the use of microwave irradiation allowed reaction to operate in only two minutes. Under optimized reaction conditions, linear alkynes bearing aryl and heteroaryl substituents were successfully cyclized with good level of stereoselectivity. (C) 2019 Elsevier Ltd. All rights reserved.
Stereoselective access to heteroarylmethylene-substituted pyrrolidines: fully organocatalytic Mannich–hydroamination reactions
作者:Alexandre Jean、Jérôme Blanchet、Jacques Rouden、Jacques Maddaluno、Michaël De Paolis
DOI:10.1039/c2cc38954a
日期:——
A one-pot sequence of organocatalytic transformations delivers heteroarylmethylene-substituted pyrrolidines with high stereo- and enantioselectivity. A Mannich coupling of N-heteroarylalkyne aldehydes with aldimine and an original metal-free hydroamination of the resulting adducts are the key transformations of the process delivering highly functionalized molecules with high potential for synthetic applications.