✦ LIBER ✦

Chelate-Controlled Additions of Titanium and Lithium Enolates to Chiral β-Formyl Esters – Diastereofacial and Simple Diastereoselectivity

✍ Scribed by Angert, Hubert ;Schumacher, Ralf ;Reißig, Hans-Ulrich

Publisher: Wiley (John Wiley & Sons)
Year: 1996
Tongue: English
Weight: 599 KB
Volume: 129
Category: Article
ISSN: 0009-2940
DOI: 10.1002/cber.19961290218

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Additions of Silyl Enol Ethers to β-Form

Additions of Silyl Enol Ethers to β-Formyl Esters - a Chelate-controlled Synthesis of the Pheromone (+)-Eldanolide

✍ Angert, Hubert ;Czerwonka, Regina ;Reißig, Hans-Ulrich 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 466 KB

## Abstract Chelate‐controlled Mukaiyama reaction of silyl enol ethers 2a, 2b, 2c, and 2d with β‐formylcarboxylate 1 in the presence of TiCl~4~ provided γ‐lactones 3a, 3b, 3c, and 3d in very good yields and with good to excellent __trans__ selectivities. The use of BF~3~, SnCl~4~, and SnBr~4~ as Le

Michael additions of the lithium enolate

Michael additions of the lithium enolates of α-heterosubstituted esters and amides to a chiral α,β-unsaturated carbonyl acceptor, ethyl (E-3-[(S)-2,2-Dimethyl-1,3-dioxolan-4-yl]propenoate. High stereoselection and chiral induction

✍ Masafumi Nomura; Shuji Kanemasa 📂 Article 📅 1994 🏛 Elsevier Science 🌐 French ⚖ 351 KB