Radical-Mediated Carboxylation of Alkyl Iodides with [<sup>11</sup>C]Carbon Monoxide in Solvent Mixtures
作者:Oleksiy Itsenko、Bengt Långström
DOI:10.1021/jo047806s
日期:2005.3.1
[carboxyl-11C]Carboxylic acids were prepared from alkyl iodides via photoinitiated radical reactions using 10-8 mol of [11C]carbonmonoxide in binary and ternary homogeneous solvent mixtures. Short- (isobutyric), medium-, and long-chain saturated fatty acids (heptadecanoic) were labeled with isolated decay-corrected radiochemical yields ranging from 55% to 70% in 5−7-min reactions. The conversion of [11C]carbon monoxide
Carbonylative Transformation of Allylarenes with CO Surrogates: Tunable Synthesis of 4-Arylbutanoic Acids, 2-Arylbutanoic Acids, and 4-Arylbutanals
作者:Fu-Peng Wu、Da Li、Jin-Bao Peng、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b02047
日期:2019.7.19
In this Communication, procedures for the selective synthesis of 4-arylbutanoic acids, 2-arylbutanoic acids, and 4-arylbutanals from the same allylbenzenes have been developed. With formic acid or TFBen as the CO surrogate, reactions proceed selectively and effectively under carbon monoxide gas-free conditions.
WO2006/134474
申请人:——
公开号:——
公开(公告)日:——
The Transannular Rearrangement of 5-Cyclodecynone
作者:Michael F. Wempe、John R. Grunwell
DOI:10.1021/jo00114a018
日期:1995.5
The acid-catalyzed rearrangement of 5-cyclodecynone (1) to bicyclo[4.4.0]-1(6)-decen-2-one (5) has been investigated via C-13 and deuterium labeling experiments, which showed that the transannular rearrangement proceeds by a mechanism not involving an enol of 5-cyclodecynone. Subjecting 5-cyclodecynone to NBS in ethyl ether resulted in the formation of a dibromooxetane 21 which arose from a bromo allylic alcohol 20 formed from 5-cyclodecynone and HBr. The chloro allylic alcohol 28 was formed from HCl and was subsequently converted to enone 5. Pathways were investigated using AM1 calculations. As a result, a modified mechanism consistent with all the experimental data is proposed for the acid-catalyzed rearrangement of 1 to 5.
SCHIKETANZ, ANA;POGANY, IULIU;GHEORGHIU, MIRCEA D.;NECULA, ATENA;BALABAN,+, J. LABELL. COMPOUNDS AND RADIOPHARM., 27,(1989) N, C. 971-976
作者:SCHIKETANZ, ANA、POGANY, IULIU、GHEORGHIU, MIRCEA D.、NECULA, ATENA、BALABAN,+