Zobrazeno 1 - 3
of 3
pro vyhledávání: '"Olukayode T. Akinnusi"'
Autor:
Jianheng Shen, Vishal Jheengut, Dale E. Ward, Idralyn Q. Alarcon, J. Wilson Quail, Olukayode T. Akinnusi
Publikováno v:
Tetrahedron: Asymmetry. 15:2425-2430
Enantioselective protonation of the s -BuLi derived lithium enolate of ( S )-phenyl 1,4-dioxa-8-thia-spiro[4.5]decane-6-carbothioate 14 with N -isopropylephedrine 15 gives 14 as a 10:1 mixture of enantiomers. Recrystallization of nonracemic 14 gives
Autor:
Dale E. Ward, K Saravanan, M. Abdul Rasheed, Olukayode T. Akinnusi, H. Martin Gillis, Pradip K. Sasmal
Publikováno v:
Organic letters. 8(12)
Meso 1,9-diketones (six to seven stereocenters) are readily obtained by stepwise or simultaneous two-directional aldol reactions of tetrahydro-4H-thiopyran-4-one with a thiopyran-derived aldehyde or dialdehyde. Enantioselective enolizations of these
Publikováno v:
Organic letters. 7(6)
[reaction: see text] Proline-catalyzed aldol reactions of tetrahydro-4H-thipyranone with racemic 1,4-dioxa-8-thia-spiro[4.5]decane-6-carboxaldehyde and with meso/dl 1,4-dioxa-8-thiaspiro[4.5]decane-6,10-dicarboxaldehyde proceed with dynamic kinetic r