✦ LIBER ✦

Transmission of electronic effects through 2-[donor]-1-[acceptor]-cyclopropane

✍ Scribed by Miguel E. Alonso; Sarah V. Pekerar; Maria L. Borgo

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 664 KB
Volume: 28
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260281110

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The through‐ring conjugation between π‐donor and attractor substitutents on vicinal carbons of cyclopropane with the direct participation of the ring was assessed using proton and ^13^C NMR. Appropriate ^1^H NMR correlations were obtained between σp and δH of the trimethylene protons. However, aryl through‐space field effects were found to obscure individual conjugative effects. Conversely, the ^13^C NMR data implied the occurrence of competitive conjugation of π‐groups with the ring but gave no proof for the existence of the actual transmission of conjugative effects through the C‐1–C‐2 bond of the ring.

📜 SIMILAR VOLUMES

Transmission of electronic effects throu

Transmission of electronic effects through cyclopropane. II.—Comparative modulation of 1H chemical shifts by aryloxy and aryl substituents in 2-(donor)-1-(acceptor)cyclopropanes

✍ Miguel E. Alonso; Sarah V. Pekerar 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 615 KB

Transmission of Electronic Effects Through C yclopropane 11.-Comparative Modulation of 'H Chemical Shifts by Aryloxy and Aryl Siibstituents in 2-(Donor)-l-(acceptor)cyclopropanes'~ Miguel E.

Electron donor-acceptor photochemistry o

Electron donor-acceptor photochemistry of 1-cyano-naphthalene with norbornadiene: Stereospecific regiorandom [2 + 2] cycloaddition

✍ Hengxin Weng; Heinz D. Roth 📂 Article 📅 1996 🏛 Elsevier Science 🌐 French ⚖ 239 KB

Electron Donor-Acceptor Compounds, 45 Sy

Electron Donor-Acceptor Compounds, 45 Syntheses of [2.2]-, [3.3]-, and [4.4]Paracyclophanes with 1,2,4,5-Tetracyanobenzene Units as Electron Acceptors

✍ Staab, Heinz A. ;Wahl, Peter ;Kay, Kwang-Yol 📂 Article 📅 1987 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 994 KB

ChemInform Abstract: Sc(OTf)3-Catalyzed

ChemInform Abstract: Sc(OTf)3-Catalyzed Smooth Tandem [3 + 2] Cycloaddition/Ring Opening of Donor—Acceptor Cyclopropane 1,1-Diesters with Enol Silyl Ethers.

✍ Jie Fang; Jun Ren; Zhongwen Wang 📂 Article 📅 2009 🏛 John Wiley and Sons ⚖ 48 KB

ChemInform Abstract: Highly Diastereosel

ChemInform Abstract: Highly Diastereoselective Synthesis of 1-Pyrrolines via SnCl4-Promoted [3 + 2] Cycloaddition Between Activated Donor—Acceptor Cyclopropanes and Nitriles.

✍ Gopal Sathishkannan; Kannupal Srinivasan 📂 Article 📅 2012 🏛 John Wiley and Sons ⚖ 41 KB 👁 2 views

Highly Diastereoselective Synthesis of 1-Pyrrolines via SnCl 4 -Promoted [3 + 2] Cycloaddition Between Activated Donor-Acceptor Cyclopropanes and Nitriles. -The products are isolated as single cis diastereomers. Using standard imine chemistry, the preparation of useful derivatives such as (VI) is p

Structures and Properties of Tris(donor)

Structures and Properties of Tris(donor)-Tris(acceptor)-Substituted Benzenes, 8!!. On the Balance of Steric, Electronic and Hydrogen Bond Effects in 1,3,5-Tris(amino)-2,4,6-Tris(acceptor)-Substituted Benzenes

✍ Jens Wolff, J. ;Gredel, Frank ;Hillenbrand, Daniela ;Irngartinger, Hermann 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 832 KB

## Abstract The conformational properties of triamino‐substituted 1,3,5‐trinitrobenzenes were studied by X‐ray crystallography, dynamic NMR spectroscopy, and semiempirical calculations. As amino substituents all possible combinations of a dialkyl‐, a monoalkylamino, and an amino group were used. Al