An efficient acid hydrolysis of the ether bond assisted by the neighbouring benzamide group. Part 3

被引:12
作者
Arcelli, A [1 ]
Porzi, G [1 ]
Rinaldi, S [1 ]
Sandri, S [1 ]
机构
[1] Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
来源
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 | 2001年 / 03期
关键词
D O I
10.1039/b008748n
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The acid hydrolytic cleavage of 1 to 2, assisted by a neighbouring benzamide group, was kinetically investigated in a wide range of HCl concentrations (1.67-8.7 M) and at various temperatures. Kinetic measurements were performed also in the presence of LiCl at constant ionic strength (I = 5 M). The rate determining step of the acid hydrolysis of 1 was recognized through the investigation of the acid catalyzed cyclization of 3 to 2. Thermodynamic activation parameters were calculated and the experimental data discussed. The participation of the neighbouring benzamide group was evaluated to be about 7.3 x 10(3).
引用
收藏
页码:296 / 301
页数:6
相关论文
共 12 条
[1]   CATALYTIC INTRAMOLECULAR PARTICIPATION OF AMIDE GROUP IN THE ACID-HYDROLYSIS OF METHYL-ETHER LINKAGE [J].
ARCELLI, A ;
PORZI, G ;
SANDRI, S .
TETRAHEDRON, 1995, 51 (35) :9729-9736
[2]   Participation of neighbouring amide group in the competitive acid catalysed hydrolysis of ether linkage and an intramolecular S(N)2 reactions .2. [J].
Arcelli, A ;
Papa, M ;
Porzi, G ;
Sandri, S .
TETRAHEDRON, 1997, 53 (30) :10513-10516
[3]  
BAMFORD CH, 1969, COMPREHENSIVE CHEM K, V2, P310
[5]   HAMMETT ACIDITY FUNCTION AND ITS NON-APPLICABILITY TO AMIDES [J].
KATRITZKY, AR ;
WARING, AJ ;
YATES, K .
TETRAHEDRON, 1963, 19 (03) :465-&
[6]   Enthalpy and entropy in ring closure reactions [J].
Lightstone, FC ;
Bruice, TC .
BIOORGANIC CHEMISTRY, 1998, 26 (04) :193-199
[7]  
LOWRY TH, 1987, MECHANISM THEORY ORG, P259
[8]  
ROBINSON RA, 1959, ELECTROLYTE SOLUTION, P18
[9]  
ROCHESTER CH, 1970, ACIDITY FUNCTIONS, P28
[10]  
ROCHESTER CH, 1970, ACIDITY FUNCTIONS, P39