Ring-chain tautomerism and crystal structure of some 1,3-oxazacyclanes, and the electrophilic substituent constants for some heteroaryl groups in solution and in the gas-phase
In principle, the ring-chain tautomeric ratios of a number of 2-heteroaryl-substituted oxazolidines and tetrahydro-1,3-oxazines are well suited for determination of the Hammett-Brown sigma+ constants of heteroaryl substituents such as 2-furyl, 3-furyl, 3-thienyl and 2-pyrrolyl in CDCl3 solution and...
Elmentve itt :
| Szerzők: | |
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| Dokumentumtípus: | Cikk |
| Megjelent: |
1994
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| Sorozat: | HETEROCYCLES
37 No. 2 |
| Tárgyszavak: | |
| doi: | 10.3987/com-93-s121 |
| mtmt: | 1015658 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/31957 |
| LEADER | 01702nab a2200277 i 4500 | ||
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| 005 | 20250314082641.0 | ||
| 008 | 250314s1994 hu o 000 eng d | ||
| 022 | |a 0385-5414 | ||
| 024 | 7 | |a 10.3987/com-93-s121 |2 doi | |
| 024 | 7 | |a 1015658 |2 mtmt | |
| 040 | |a SZTE Publicatio Repozitórium |b hun | ||
| 041 | |a eng | ||
| 100 | 1 | |a Fülöp Ferenc | |
| 245 | 1 | 0 | |a Ring-chain tautomerism and crystal structure of some 1,3-oxazacyclanes, and the electrophilic substituent constants for some heteroaryl groups in solution and in the gas-phase |h [elektronikus dokumentum] / |c Fülöp Ferenc |
| 260 | |c 1994 | ||
| 300 | |a 1093-1107 | ||
| 490 | 0 | |a HETEROCYCLES |v 37 No. 2 | |
| 520 | 3 | |a In principle, the ring-chain tautomeric ratios of a number of 2-heteroaryl-substituted oxazolidines and tetrahydro-1,3-oxazines are well suited for determination of the Hammett-Brown sigma+ constants of heteroaryl substituents such as 2-furyl, 3-furyl, 3-thienyl and 2-pyrrolyl in CDCl3 solution and in the gas phase. However, a number of factors, and especially hydrogen-bonding, can change the monomeric character of either the ring or the chain form (or both), leading to deviations from the ideal sigma+ values. X-Ray analysis has demonstrated the chain structures of the products of the reactions of L-(-)-norpseudoephedrine and (+/-)-trans-2-aminomethylcyclohexanol with pyrrole-2-carboxaldehyde. | |
| 650 | 4 | |a Kémiai tudományok | |
| 650 | 4 | |a Általános orvostudomány | |
| 700 | 0 | 1 | |a Sillanpää Reijo |e aut |
| 700 | 0 | 1 | |a Dahlqvist Martti |e aut |
| 700 | 0 | 1 | |a Pihlaja Kalevi |e aut |
| 700 | 0 | 1 | |a Vainiotalo Pirjo |e aut |
| 856 | 4 | 0 | |u http://publicatio.bibl.u-szeged.hu/31957/1/aok_klny_32_94.pdf |z Dokumentum-elérés |