The free radical addition reactions of [1.1.1] propellane (1) are described in some detail and allowed the preparation of a wide variety of 1,3-disubstituted bicyclo [1.1.1.] pentanes. The reaction of 1 with free radicals was more rapid than that of bicyclo [1.1.0] butane (2), whereas bicyclo [2.1.0] pentane (3) was relatively inert
Synthesis of Bisbicyclo[1.1.1]pentyldiazene. The Smallest Bridgehead Diazene
作者:Md. T. Hossain、Jack W. Timberlake
DOI:10.1021/jo010212u
日期:2001.9.1
Bisbicyclo[1.1.1]pentyldiazene, the smallest bicyclicazo compound, has been synthesized from the precursor [1.1.1]propellane via synthesis of N,N'-bis(bicyclo[1.1.1]pentyl)sulfamide and azoxybicyclo[1.1.1]pentane. The UV absorption of this diazene at 382 nm indicates that the compound is the trans isomer. Conversion to the cis isomer by irradiation was not possible because of attainment of a photostationary
Insertion of [1.1.1]propellane into aromatic disulfides
作者:Robin M Bär、Gregor Heinrich、Martin Nieger、Olaf Fuhr、Stefan Bräse
DOI:10.3762/bjoc.15.114
日期:——
and unsymmetrically substituted 1,3-bissulfanylbicyclo[1.1.1]pentanes from disulfides and [1.1.1]propellane. Bicyclo[1.1.1]pentanes (BCPs) recently gained interest as rigid linkers and as bioisosters of para-substituted benzene and alkyne moieties. The most promising precursor for BCPs is [1.1.1]propellane (1). The available methods to synthesize BCPs are quite limited and many groups contribute to the
Alkyl and Aryl Thiol Addition to [1.1.1]Propellane: Scope and Limitations of a Fast Conjugation Reaction
作者:Robin M. Bär、Stefan Kirschner、Martin Nieger、Stefan Bräse
DOI:10.1002/chem.201704105
日期:2018.1.26
carboxy‐, amino‐ and nitro‐substituted thiols could be added to 1 with few by‐products in 16–90 % yield. Oxidation of the products allows tuning of the polarity and subsequent reactions of the products. The click‐type reaction proceeds even faster with selenols, as was shown in a proof of concept. Thiol addition to 1 offers a facile tool for surface modification, conjugation and tuning of hydrophilicity in
A Novel Route towards Bicyclo[1.1.1]pentane Sulfoxides from a Bench-Stable Starting Material
作者:Stefan Bräse、Lukas S. Langer、Mareen Stahlberger、Robin M. Bär
DOI:10.1055/a-2210-0893
日期:——
that have gained a lot of interest in drug discovery as non-conjugated rigid hydrocarbons. There has been substantial progress in the synthesis of carbon- and nitrogen-substituted derivatives using [1.1.1]propellane as a precursor, while sulfur-substituted BCPs are rather underdeveloped. This work investigates a new method for the synthesis of BCP-sulfoxides. Herein, a previously reported bench-stable