✦ LIBER ✦

Ytterbium triflate-catalyzed asymmetric hetero Diels-Alder cycloaddition of a 1-thiabuta-1,3-diene with a chiral N-acryloyloxazolidinone dienophile. Diastereoface control by solvents or achiral additives

✍ Scribed by Takao Saito; Mikako Kawamura; Jun-ichi Nishimura

Publisher: Elsevier Science
Year: 1997
Tongue: French
Weight: 182 KB
Volume: 38
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(97)00520-0

No coin nor oath required. For personal study only.

✦ Synopsis

Ytterbium triflate [Yb(OTf)3]-catalyzed asymmetric hetero Diels-Alder cycloaddition reaction of 2,4-diphenyl-l-thiabuta-l,3-diene with (S)-N-acryloyl-4-benzyl-l,3-oxazolidin-2-one is described in which the sense of the ~-faciai selectivity can be controlled by solvents or additives employed without altering the auxiliary chirality for the asymmetric induction.

📜 SIMILAR VOLUMES

ChemInform Abstract: Ytterbium Triflate-

ChemInform Abstract: Ytterbium Triflate-Catalyzed Asymmetric Hetero Diels-Alder Cycloaddition of a 1-Thiabuta-1,3-diene with a Chiral N- Acryloyloxazolidinone Dienophile. Diastereoface Control by Solvents or Achiral Additives.

✍ T. SAITO; M. KAWAMURA; J. NISHIMURA 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 32 KB 👁 1 views

Lewis acid-catalyzed asymmetric hetero D

Lewis acid-catalyzed asymmetric hetero Diels-Alder cycloaddition of a 1-Thiabuta-1,3-diene with Chiral N-Acryloyl- and N-Crotonoyl-oxazolidinone dienophiles

✍ Takao Saito; Hirofumi Suda; Mikako Kawamura; Jun-ichi Nishimura; Akemi Yamaya 📂 Article 📅 1997 🏛 Elsevier Science 🌐 French ⚖ 235 KB

Me2AICI -and TiCl4-catalyzed asymmetric hetero Diels-Alder cycloaddition reactions of 2,4-diphenyl-l-thiabuta-l,3-diene with (S)-N-acryloyl-and (S)-N-crotonoyl-4-benzyl-l,3-oxazolidin-2one dienophiles are described in which not only the sense of the n-facial selectivity but also the degree dramatica