Concave reagents, 45.1 2,6-Di-tert-butylpyridine-loaded dendrimers and their use in vinyl triflate synthesis

Synthesis

Volumn , Issue 9, 2005, Pages 1383-1388

  Lüning, Ulrich ^a   Marquardt, Torsten ^a  

^a UNIVERSITY OF KIEL   (Germany)

Author keywords

Base catalysis; Dendrimers; Recycling; Steric hindrance; Triflate

Indexed keywords

AROMATIC COMPOUNDS; DERIVATIVES; RECYCLING; SYNTHESIS (CHEMICAL);

CONCAVE REAGENTS; CYCLOHEXANONE; DENDRONS; RECYCLABLE BASES;

DENDRIMERS;

1,1,1 TRIS[4 [3,5 BIS(2,6 DI TERT BUTYLPYRIDIN 4 YLMETHOXY)BENZYLOXY]PHENYL]ETHANE; 1,1,1 TRIS[4 [3,5 BIS[3,5 BIS(2,6 DI TERT BUTYLPYRIDIN 4 YLMETHOXY)BENZYLOXY]BENZYLOXY]PHENYL]ETHANE; 2,6 DI TERT BUTYLPYRIDINE DERIVATIVE; 3,5 BIS(2,6 DI TERT BUTYLPYRIDIN 4 YLMETHOXY)BENZYL ALCOHOL; 3,5 BIS(2,6 DI TERT BUTYLPYRIDIN 4 YLMETHOXY)BENZYL BROMIDE; 3,5 BIS[3,5 BIS(2,6 DI TERT BUTYLPYRIDIN 4 YLMETHOXY)BENZYLOXY]BENZYL ALCOHOL; 3,5 BIS[3,5 BIS(2,6 DI TERT BUTYLPYRIDIN 4 YLMETHOXY)BENZYLOXY]BENZYL BROMIDE; 4 (BROMOMETHYL) 2,6 DI TERT BUTYLPYRIDINE; 4,4' BIS[3,5 BIS(2,6 DI TERT BUTYLPYRIDINE 4 YLMETHOXY)BENZYLOXY]BIPHENYL; 4,4' BIS[3,5 BIS[3,5 BIS(2,6 DI TERT BUTYLPYRIDIN 4 YLMETHOXY)BENZYLOXY]BENZYLOXY]BIPHENYL; CYCLOHEXANONE; CYCLOHEXENYL 1 TRIFLUOROMETHANESULFONIC ACID; DENDRIMER; PYRIDINE DERIVATIVE; TRIFLUOROMETHANESULFONIC ACID; UNCLASSIFIED DRUG; VINYL TRIFLUOROMETHANESULFONIC ACID;

ARTICLE; CHEMICAL REACTION; CHEMICAL STRUCTURE; COMPARATIVE STUDY; SYNTHESIS;

EID: 20644442016     PISSN: 00397881     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2005-865355     Document Type: Article

References (22)

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19. + - 325] was detectable but did not match any fragments. Relative intensities did not change upon variation of the laser power. Possibly, impure dendrons have been used lacking one pyridine and one dihydroxybenzyl alcohol unit. In other batches using dendrons which had been purified by GPC, this impurity could be avoided.
20. + - 325] signals could be detected (m/z = 3519), probably because the dendron contained the same impurity. Again, the impurity could be avoided when dendron 13 was purified by GPC.
21. Adah, S. A.; Nair, V. Tetrahedron 1997, 53, 6747.
22. Sometimes the material had to be purified by GPC which lowered the yield.