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Volumn 54, Issue 9, 2015, Pages 2724-2728

Nucleophilic addition of amines to ruthenium carbenes: Ortho-(alkynyloxy)benzylamine cyclizations towards 1,3-benzoxazines

Author keywords

Benzoxazines; Carbenes; Cyclization; Rearrangements; Ruthenium

Indexed keywords

ADDITION REACTIONS; ORGANIC COMPOUNDS; RUTHENIUM; RUTHENIUM COMPOUNDS;

EID: 85027954665     PISSN: 14337851     EISSN: 15213773     Source Type: Journal    
DOI: 10.1002/anie.201410284     Document Type: Article
Times cited : (58)

References (70)
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    • note
    • See the Supporting Information for details.
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    • note
    • With a poorly coordinating and less nucleophilic nitrogen atom in tosylamide 1o the reaction resulted in a complex mixture. On the other hand, tertiary pyrrolidine derivative 1p was recovered unaltered after 24 h. (Chemical Equation Presented)The reaction of thioether 4 under optimized reaction conditions afforded the corresponding dienyl sulfide 3 in 56% yield and the reaction of tosylamide 5 gave a complex reaction mixture. See Supporting Information for details. (Chemical Equation Presented)The reaction of thioether 4 under optimized reaction conditions afforded the corresponding dienyl sulfide 3 in 56% yield and the reaction of tosylamide 5 gave a complex reaction mixture. See Supporting Information for details. (Chemical Equation Presented)
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    • 2) was subjected to the reaction conditions, smooth formationof the diene 3b was observed and suggests the formation of a vinyl ruthenium carbene intermediate.
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    • note
    • The mechanistic alternative based on 1,2-propargylic shift to give an enolether intermediate followed by the amine nucleophilic attack was discarded since the parent (prop-2-yn-1-yloxy)benzene gave the expected disylilated Z,Z-diene (84%, via a vinyl Ru carbene, Ref. [24]) instead the rearranged enolether derivative (Rautenstrauch product). See the Supporting Information for details.
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    • note
    • For a Brønsted acid catalyzed cyclization through benzoylimine intermediates, see Ref. [12h].


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.