Method for synthesizing tetrahydroisoquinoline oxazolidine
申请人:National Chi Nan University
公开号:US10093682B1
公开(公告)日:2018-10-09
The invention relates to a method for synthesizing tetrahydroisoquinoline oxazolidine. The method is carried out at a room temperature between 20° C. and 35° C.
该发明涉及一种合成四氢异喹啉噁唑啉的方法。该方法在20°C至35°C的室温下进行。
Bimetallic Rhodium(II)/Indium(III) Relay Catalysis for Tandem Insertion/Asymmetric Claisen Rearrangement
insertion/asymmetric Claisen rearrangement tandem reaction of N‐sulfonyl‐1,2,3‐triazoles with allyl alcohol esters was achieved by bimetallic relay catalytic systems involving achiral rhodium salt and chiral N,N′‐dioxide–indium(III) complex. This manifold could overcome the limitation of single RhII catalysis, providing a straight and facileroute to various enantioenriched β/γ‐amino acid derivatives
Organocatalytic Asymmetric Synthesis of Spirooxindole Embedded Oxazolidines
作者:Chandrakanta Parida、Buddhadeb Mondal、Animesh Ghosh、Subhas Chandra Pan
DOI:10.1021/acs.joc.1c00644
日期:2021.9.17
oxazolidines has been developed via a dominoreaction involving hemiaminal formation, followed by an unprecedented aza-Michael reaction between isatin derived N-Boc ketimines and γ-hydroxy enones. A quinine derived bifunctional squaramide catalyst was found to be efficient for this reaction, and the products were obtained in good diastereoselectivity and with high enantioselectivity.
prevalent in many naturalproducts and bioactive compounds. In addition, a number of them are important synthetic intermediates. Thus, the synthesis of such structures is a significant goal in the field of organic chemistry. However, the development of catalytic asymmetric cycloetherification for the straightforward synthesis of these compounds remains a challenge. In this study, we propose the use of aminothiourea
One-Pot Asymmetric Synthesis of Spiropyrazolone-Linked Cyclopropanes and Benzofurans through a General Michael Addition/Chlorination/Nucleophilic Substitution Sequence
A sequential and general strategy has been successfully developed for the synthesis of spiropyrazolone scaffolds. This intriguing transformation of the asymmetric multicomponent catalysis process was realized with the combination of Michael addition/chlorination/nucleophilic substitution in a one-pot sequence, giving rise to a series of spiropyrazolones with fully substituted cyclopropanes and spi