Co(II)‐salen catalyzed stereoselective cyclopropanation of fluorinated styrenes
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چکیده
منابع مشابه
Gold(I)-catalyzed stereoselective olefin cyclopropanation.
A triphenylphosphinegold(I)-catalyzed cyclopropanation of olefins using propargyl esters as gold(I)-carbene precursors is reported. This reaction provided the basis for the use of a DTBM-SEGPHOS gold(I) complex as a catalyst in the enantioselective (up to 94% ee) preparation of vinyl cyclopropanes with high cis-selectivity.
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Organic chemists have always been fascinated by the cyclopropane subunit.1 The smallest cycloalkane is found as a basic structural element in a wide range of naturally occurring compounds.2 Moreover, many cyclopropane-containing unnatural products have been prepared to test the bonding features of this class of highly strained cycloalkanes3 and to study enzyme mechanism or inhibition.4 Cyclopro...
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An efficient and stereoselective synthesis of vinylphosphonates and phosphine oxides was developed starting from styrenes using AgNO3 as the catalyst and K2S2O8 as the oxidant. The success of the reaction was found to be critically dependent on the use of TEMPO as the additive.
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A one-pot three-component cascade reaction proceeds by way of a Lewis acid-catalyzed Knoevenagel condensation/Nazarov cyclization/electrophilic fluorination sequence to afford fluorinated 1-indanone derivatives in moderate to good yields with high diastereoselectivities.
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ژورنال
عنوان ژورنال: Chirality
سال: 2019
ISSN: 0899-0042,1520-636X
DOI: 10.1002/chir.23144