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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Adição nucleofílica em alilaminas promovida por complexos de paládio (II)

Schenato, Rossana Angelica January 1994 (has links)
o presente trabalho relata o estudo das reações de carbo- e alcoxipaladação de olefinas funcionalizadas. Para tal propósito, foram sintetizadas as alilaminas 4,N,N-dibenzilamino-5-metilexen-2-enoato de metila (138), 3,N,N-dibenzilaminoprop-l-eno (111) e 3,N,N-(R,R)-α,α-dimetildibenzilaminoprop-l-eno(114). A alilamina (138), desativada pelo grupo carbóxi, e a alilamina (114), devido a presença dos grupos volumosos dimetildibenzil ligados ao nitrogênio, não sofrem adição nucleofílica, na presença de sais de paládio (II). Entretanto, a alilamina (111), na presença de PdCl2(PhCN) 2 e carboxilatos, produz seletivamente complexos paladociclos de cinco membros. / We present the synthesis of chiral and achiral allylic amines derived from α-amino acids. The carbo- and alcoxy-palladation of these allylic amines have been investigated. The allylic amine methyl 4,N,N-dibenzylamino-5-methylhexen-2-enoate (138), desactivated by carboxy groups, and the allylic amine 3,N,N-(R,R)-α,αdimethyldibenzylaminoprop-l-ene (114), with the bulky group α,α-dimethyldibenzyl attached at amino group, did not undergo nucleophilic additions, in the presence of Pd(II) salts. However, the 3,N,N-dibenzylaminoprop-l-ene (111), in the presence of PdCl2(PhCN)2 and carboxilates, produces selectively five-membered palladocyclic complexes.
2

Adição nucleofílica em alilaminas promovida por complexos de paládio (II)

Schenato, Rossana Angelica January 1994 (has links)
o presente trabalho relata o estudo das reações de carbo- e alcoxipaladação de olefinas funcionalizadas. Para tal propósito, foram sintetizadas as alilaminas 4,N,N-dibenzilamino-5-metilexen-2-enoato de metila (138), 3,N,N-dibenzilaminoprop-l-eno (111) e 3,N,N-(R,R)-α,α-dimetildibenzilaminoprop-l-eno(114). A alilamina (138), desativada pelo grupo carbóxi, e a alilamina (114), devido a presença dos grupos volumosos dimetildibenzil ligados ao nitrogênio, não sofrem adição nucleofílica, na presença de sais de paládio (II). Entretanto, a alilamina (111), na presença de PdCl2(PhCN) 2 e carboxilatos, produz seletivamente complexos paladociclos de cinco membros. / We present the synthesis of chiral and achiral allylic amines derived from α-amino acids. The carbo- and alcoxy-palladation of these allylic amines have been investigated. The allylic amine methyl 4,N,N-dibenzylamino-5-methylhexen-2-enoate (138), desactivated by carboxy groups, and the allylic amine 3,N,N-(R,R)-α,αdimethyldibenzylaminoprop-l-ene (114), with the bulky group α,α-dimethyldibenzyl attached at amino group, did not undergo nucleophilic additions, in the presence of Pd(II) salts. However, the 3,N,N-dibenzylaminoprop-l-ene (111), in the presence of PdCl2(PhCN)2 and carboxilates, produces selectively five-membered palladocyclic complexes.
3

Adição nucleofílica em alilaminas promovida por complexos de paládio (II)

Schenato, Rossana Angelica January 1994 (has links)
o presente trabalho relata o estudo das reações de carbo- e alcoxipaladação de olefinas funcionalizadas. Para tal propósito, foram sintetizadas as alilaminas 4,N,N-dibenzilamino-5-metilexen-2-enoato de metila (138), 3,N,N-dibenzilaminoprop-l-eno (111) e 3,N,N-(R,R)-α,α-dimetildibenzilaminoprop-l-eno(114). A alilamina (138), desativada pelo grupo carbóxi, e a alilamina (114), devido a presença dos grupos volumosos dimetildibenzil ligados ao nitrogênio, não sofrem adição nucleofílica, na presença de sais de paládio (II). Entretanto, a alilamina (111), na presença de PdCl2(PhCN) 2 e carboxilatos, produz seletivamente complexos paladociclos de cinco membros. / We present the synthesis of chiral and achiral allylic amines derived from α-amino acids. The carbo- and alcoxy-palladation of these allylic amines have been investigated. The allylic amine methyl 4,N,N-dibenzylamino-5-methylhexen-2-enoate (138), desactivated by carboxy groups, and the allylic amine 3,N,N-(R,R)-α,αdimethyldibenzylaminoprop-l-ene (114), with the bulky group α,α-dimethyldibenzyl attached at amino group, did not undergo nucleophilic additions, in the presence of Pd(II) salts. However, the 3,N,N-dibenzylaminoprop-l-ene (111), in the presence of PdCl2(PhCN)2 and carboxilates, produces selectively five-membered palladocyclic complexes.

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