Matches in SemOpenAlex for { <https://semopenalex.org/work/W2147295938> ?p ?o ?g. }
Showing items 1 to 98 of
98
with 100 items per page.
- W2147295938 endingPage "11053" @default.
- W2147295938 startingPage "11044" @default.
- W2147295938 abstract "The carbene complex 5-(2,2-dimethyl-2H-chromene)methoxylmethylene chromium pentacarbonyl will undergo a benzannulation reaction with phenylacetylene, 1-pentyne, 3-hexyne, and trimethylsilylacetylene to give 7-hydroxy-10-methoxy-3H-naphtho[2.1-b]pyrans as the primary product. These compounds are difficult to obtain pure due to their sensitivity to air. If the benzannulation reaction is performed in conjunction with protection of the phenol function at C-7, then good to excellent yields of 7-alkoxy-10-methoxy-3H-naphtho[2.1-b]pyrans are afforded. If the 7-hydroxy products are captured by triflic anhydride, then the resulting aryl triflate can be used to access 3H-naphtho[2.1-b]pyrans bearing C-7 carbon substituents. The 7-hydroxy products can be oxidized to 3H-naphtho[2,1-b]pyran-7,10-diones which are stable. The chromenyl carbene complex reacts with 1,6-bis(triisopropylsilyl)-1,3,5-hexatriyne to give a 2,3-dihydro-2,2-dimethylbenzo[de]chromene, a product type that has not been seen before in the reaction of Fischer carbene complexes with alkynes. A mechanism is proposed for this process that involves alpha,beta-hydride elimination from a chromacyclobutane intermediate. Chromenyl tungsten complexes react with alkynes to give products that result from cyclization without CO insertion." @default.
- W2147295938 created "2016-06-24" @default.
- W2147295938 creator A5002616102 @default.
- W2147295938 creator A5048356145 @default.
- W2147295938 creator A5068068080 @default.
- W2147295938 date "2006-08-01" @default.
- W2147295938 modified "2023-10-12" @default.
- W2147295938 title "Chromene Chromium Carbene Complexes in the Syntheses of Naphthopyran and Naphthopyrandione Units Present in Photochromic Materials and Biologically Active Natural Products" @default.
- W2147295938 cites W1970393591 @default.
- W2147295938 cites W1978890358 @default.
- W2147295938 cites W1979813798 @default.
- W2147295938 cites W1980605237 @default.
- W2147295938 cites W1990948583 @default.
- W2147295938 cites W1999088572 @default.
- W2147295938 cites W2003162606 @default.
- W2147295938 cites W2018323806 @default.
- W2147295938 cites W2018419721 @default.
- W2147295938 cites W2028896225 @default.
- W2147295938 cites W2031124180 @default.
- W2147295938 cites W2080250430 @default.
- W2147295938 cites W2083626216 @default.
- W2147295938 cites W2088688215 @default.
- W2147295938 cites W2151229180 @default.
- W2147295938 cites W2950223313 @default.
- W2147295938 cites W2950415694 @default.
- W2147295938 cites W2950950929 @default.
- W2147295938 cites W2951070010 @default.
- W2147295938 cites W2951448911 @default.
- W2147295938 cites W2952159421 @default.
- W2147295938 cites W2952843483 @default.
- W2147295938 doi "https://doi.org/10.1021/ja0568852" @default.
- W2147295938 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16925420" @default.
- W2147295938 hasPublicationYear "2006" @default.
- W2147295938 type Work @default.
- W2147295938 sameAs 2147295938 @default.
- W2147295938 citedByCount "55" @default.
- W2147295938 countsByYear W21472959382012 @default.
- W2147295938 countsByYear W21472959382013 @default.
- W2147295938 countsByYear W21472959382014 @default.
- W2147295938 countsByYear W21472959382015 @default.
- W2147295938 countsByYear W21472959382016 @default.
- W2147295938 countsByYear W21472959382017 @default.
- W2147295938 countsByYear W21472959382018 @default.
- W2147295938 countsByYear W21472959382019 @default.
- W2147295938 countsByYear W21472959382020 @default.
- W2147295938 countsByYear W21472959382021 @default.
- W2147295938 countsByYear W21472959382022 @default.
- W2147295938 countsByYear W21472959382023 @default.
- W2147295938 crossrefType "journal-article" @default.
- W2147295938 hasAuthorship W2147295938A5002616102 @default.
- W2147295938 hasAuthorship W2147295938A5048356145 @default.
- W2147295938 hasAuthorship W2147295938A5068068080 @default.
- W2147295938 hasConcept C155647269 @default.
- W2147295938 hasConcept C161790260 @default.
- W2147295938 hasConcept C178790620 @default.
- W2147295938 hasConcept C185592680 @default.
- W2147295938 hasConcept C2777164566 @default.
- W2147295938 hasConcept C2777505907 @default.
- W2147295938 hasConcept C2778545935 @default.
- W2147295938 hasConcept C2779128551 @default.
- W2147295938 hasConcept C2780263894 @default.
- W2147295938 hasConcept C511782168 @default.
- W2147295938 hasConcept C81180622 @default.
- W2147295938 hasConcept C90150868 @default.
- W2147295938 hasConceptScore W2147295938C155647269 @default.
- W2147295938 hasConceptScore W2147295938C161790260 @default.
- W2147295938 hasConceptScore W2147295938C178790620 @default.
- W2147295938 hasConceptScore W2147295938C185592680 @default.
- W2147295938 hasConceptScore W2147295938C2777164566 @default.
- W2147295938 hasConceptScore W2147295938C2777505907 @default.
- W2147295938 hasConceptScore W2147295938C2778545935 @default.
- W2147295938 hasConceptScore W2147295938C2779128551 @default.
- W2147295938 hasConceptScore W2147295938C2780263894 @default.
- W2147295938 hasConceptScore W2147295938C511782168 @default.
- W2147295938 hasConceptScore W2147295938C81180622 @default.
- W2147295938 hasConceptScore W2147295938C90150868 @default.
- W2147295938 hasIssue "34" @default.
- W2147295938 hasLocation W21472959381 @default.
- W2147295938 hasLocation W21472959382 @default.
- W2147295938 hasOpenAccess W2147295938 @default.
- W2147295938 hasPrimaryLocation W21472959381 @default.
- W2147295938 hasRelatedWork W1990445232 @default.
- W2147295938 hasRelatedWork W2019483556 @default.
- W2147295938 hasRelatedWork W2027289980 @default.
- W2147295938 hasRelatedWork W2028476260 @default.
- W2147295938 hasRelatedWork W2040443559 @default.
- W2147295938 hasRelatedWork W2060688858 @default.
- W2147295938 hasRelatedWork W2951741601 @default.
- W2147295938 hasRelatedWork W3083187393 @default.
- W2147295938 hasRelatedWork W3154525241 @default.
- W2147295938 hasRelatedWork W4231403183 @default.
- W2147295938 hasVolume "128" @default.
- W2147295938 isParatext "false" @default.
- W2147295938 isRetracted "false" @default.
- W2147295938 magId "2147295938" @default.
- W2147295938 workType "article" @default.