210626-65-6Relevant articles and documents
Complete reversal of enantioselection using oxazoline-containing Schiff base ligands derived from l-serine in enantioselective addition of diketene to aldehydes
Chu, Changhu,Morishita, Koji,Tanaka, Takanori,Hayashi, Masahiko
, p. 2672 - 2677 (2006)
Starting from one stereogenic center (in this case from l-serine), we obtained two chiral Schiff bases possessing oxazoline moieties, each of which recognized a different enantioface of aldehydes with a high enantiomeric excess [up to 93% ee (R) and 89% e
The asymmetric Maitland-Japp reaction and its application to the construction of the C1-C19 bis-pyran unit of phorboxazole B
Clarke, Paul A.,Santos, Soraia,Mistry, Nimesh,Burroughs, Laurence,Humphries, Alexander C.
supporting information; experimental part, p. 624 - 627 (2011/04/23)
The synthesis of the C1-C19 bis-pyran unit of phorboxazole B has been achieved. The key pyran rings were constructed by means of an asymmetric Maitland-Japp reaction and a second Maitland-Japp resolution/cyclization reaction. The longest linear sequence w
Enantioselective addition of diketene to aldehydes promoted by chiral Schiff base-titanium alkoxide complex. Application to asymmetric synthesis of potential inhibitors of HMG coenzyme reductase
Hayashi, Masahiko,Yoshimoto, Kazuya,Hirata, Naohito,Tanaka, Kiyoshi,Oguni, Nobuki,Harada, Katsumasa,Matsushita, Akio,Kawachi, Yasuhiro,Sasaki, Hiroshi
, p. 241 - 246 (2007/10/03)
Highly enantioselective addition of diketene to aldehydes was achieved by using novel Schiff base-titanium alkoxide complexes. Up to 92% ee of 5-hydroxy-3-oxoesters was obtained. This procedure provides an efficient method for the asymmetric synthesis of potential inhibitors of HMG coenzyme reductase.
Catalytic enantioselective reaction of diketene with aldehydes catalyzed by chiral Schiff base-titanium alkoxide complexes
Oguni, Nobuku,Tanaka, Kiyoshi,Ishida, Hajime
, p. 601 - 602 (2007/10/03)
The catalytic enantioselective reaction of diketene with aldehydes was achieved by the use of a catalytic amount (20 mol%) of chiral Schiff base to afford the corresponding 5-hydroxy-3-oxoesters with high enantioselectivity.
Highly efficient preparation of optically active 5-hydroxy-3-oxoesters by enantioselective reaction of diketene with aldehydes promoted by novel chiral Schiff base-titanium alkoxide complexes
Hayashi,Tanaka,Oguni
, p. 1833 - 1836 (2007/10/03)
Optically active 5-hydroxy-3-oxoesters 1 can be obtained in up to 91% enantiomeric excess (e.e.) by the enantioselective reaction of diketene with aldehydes promoted by novel chiral Schiff base-titanium alkoxide complexes.