Zobrazeno 1 - 10
of 229
pro vyhledávání: '"Lodovico Lunazzi"'
Autor:
Stefano Menichetti, Chiara Biagioli, Caterina Viglianisi, Lorenzo Tofani, Lodovico Lunazzi, Michele Mancinelli, Andrea Mazzanti
Publikováno v:
ARKIVOC, Vol 2015, Iss 4, Pp 66-79 (2015)
Externí odkaz:
https://doaj.org/article/62f23a0589c448a5a11a5e6c8925cde1
Autor:
Michele Mancinelli, Stefano Menichetti, Caterina Viglianisi, Lorenzo Tofani, Chiara Biagioli, Lodovico Lunazzi, Andrea Mazzanti
Publikováno v:
ARKIVOC, Vol 2015, Iss 4, Pp 66-79 (2015)
Two conformational diastereoisomers due to the hindered Aryl-NSO 2 rotation were observed by NMR in the model compound N,N’-bis-tosyl-N,N’-dipropargyl-1,4-diamine-2,3-dimethyl benzene 1. X-Ray analysis showed that only the syn conformation is pre
Autor:
Paolo Righi, Giorgio Bencivenni, Silvia Ranieri, Michele Mancinelli, Lodovico Lunazzi, Andrea Mazzanti
Publikováno v:
Chirality. 27:875-887
The first example of organocatalytic aziridination reaction of α-substituted-α,β-unsaturated ketones is presented. The reaction was found to be highly enantio- and diastereoselective, yielding N-tosylated aziridines. Low-temperature nuclear magnet
Publikováno v:
Chemistry - A European Journal. 15:2645-2652
Someone who says "A" should be prepared to also say "B": In contrast to cyclohexane model-based A values, biphenyl model-derived B values are powerful tools to quantify steric repulsion in and conformational behavior of ortho-substituted aromatic com
Publikováno v:
The Journal of Organic Chemistry. 74:1345-1348
Anthraquinone substituted by 2-methyl-1-naphthyl groups in positions 1,8 yields syn (meso) and anti (racemic) isomers (red and yellow colored, respectively) that interconvert with a barrier of 35.4 kcal mol(-1) in solution. Their structures were iden
Publikováno v:
The Journal of Organic Chemistry. 73:6382-6385
Low-temperature NMR spectra show that the title compound exists as a pair of conformational enantiomers, generated by the restricted rotation about the C9-Pr (i) bond, the corresponding interconversion barrier being 6.9 kcal mol (-1). This interpreta
Publikováno v:
The Journal of Organic Chemistry. 72:998-1004
By making use of low-temperature dynamic NMR spectroscopy, the rotation barriers about the sp3-sp2 bond have been determined in a number of hindered benzyl alcohols symmetrically substituted in the ortho positions, the substituents being F, Cl, Br, a
Autor:
Giorgio, Bencivenni, Paolo, Righi, Lodovico, Lunazzi, Silvia, Ranieri, Michele, Mancinelli, Andrea, Mazzanti
The first example of organocatalytic aziridination reaction of α-substituted-α,β-unsaturated ketones is presented. The reaction was found to be highly enantio- and diastereoselective, yielding N-tosylated aziridines. Low-temperature nuclear magnet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid_dedup__::4fab0810bb3b34f347577a7148c7aa3b
http://hdl.handle.net/11585/525361
http://hdl.handle.net/11585/525361
Publikováno v:
The Journal of Organic Chemistry. 70:5098-5102
Carbinols of the Ar-C(OH)R(2) type, Ar being o-isopropylphenyl, exist as stereolabile syn-clinal (sc) and anti-periplanar (ap) atropisomers when R = Me, Et, i-Pr. In the latter compound, the major atropisomer also comprises two enantiomeric forms tha
Publikováno v:
The Journal of Organic Chemistry. 70:456-462
Stereochemical analysis, supported by ab initio computations, predicts the existence of three possible stable helical conformers for o,o'-diisopropyl-1,1'-diphenylethylene (1) and o,o'-diisopropylbenzophenone (2). At low temperature the NMR spectra o