Direct Hydroboration of BB Bonds: A Mild Strategy for the Proliferation of BB Bonds期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Direct Hydroboration of BB Bonds: A Mild Strategy for the Proliferation of BB Bonds

Authors:	Prof. Dr. Holger Braunschweig Dr. Rian D. Dewhurst Dipl.‐Chem. Christian Hörl Dr. Ashwini K. Phukan Florian Pinzner Stefan Ullrich

Affiliation:	1. Institut für Anorganische Chemie, Julius‐Maximilians‐Universit?t Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www‐anorganik.chemie.uni‐wuerzburg.de/Braunschweig/;2. Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam (India)

Abstract:	Synthetic access to electron‐precise boron chains is hampered by the preferential formation of nonclassical structures. The few existing strategies for this involve either strongly reducing reagents or transition‐metal catalysts, both with distinct disadvantages. The synthesis of new furyl‐ and thienyl‐substituted diborenes is presented, along with their direct hydroboration with catecholborane (CatBH) to form a new electron‐precise B? B bond and a B₃ chain. The reaction is diastereoselective and proceeds under mild conditions without the use of strong reducing agents or transition‐metal catalysts commonly used in B‐B coupling reactions.

Keywords:	diborenes hydroboration oxygen heterocycles polyboranes sulfur heterocycles