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11.
Prof. Dr. Benjamin List Dr. Ilija Čorić Dr. Oleksandr O. Grygorenko Philip S. J. Kaib Prof. Dr. Igor Komarov Dr. Anna Lee Markus Leutzsch Dr. Subhas Chandra Pan Andrey V. Tymtsunik Manuel van Gemmeren 《Angewandte Chemie (International ed. in English)》2014,53(1):282-285
The first aminocatalyzed α‐alkylation of α‐branched aldehydes with benzyl bromides as alkylating agents has been developed. Using a sterically demanding proline derived catalyst, racemic α‐branched aldehydes are reacted with alkylating agents in a DYKAT process to give the corresponding α‐alkylated aldehydes with quaternary stereogenic centers in good yields and high enantioselectivities. 相似文献
12.
Mykhailo I. Adamovskyi Oleksiy S. Artamonov Andriy V. Tymtsunik Oleksandr O. Grygorenko 《Tetrahedron letters》2014
An unusual rearrangement of a 1-oxa-6-azaspiro[2.5]octane derivative giving access to novel 5-substituted 2-azabicyclo[3.1.0]hexanes is described. The synthetic application of the reaction is demonstrated by the synthesis of N-Boc-2,3-methano-β-proline. The amino acid was prepared through a three-step synthesis from easily available reagents in an overall yield of 15%. 相似文献