An efficient approach to a novel family of (Z)-3-amino-3-oxo-1-propenyl selenocyanates was developed based on the reaction KSeCN with 3-trimethylsilyl-2-propynamides in presence ammonium chloride methanol. The accompanied by desilylation process. products were not formed under same conditions absence chloride, which used for first time reactions acetylenes. use this new methodology allowed carr...

C11H12O2Se is triclinic, P1. Unit-cell dimensions at 293 K are a = 5.8450(10), b = 8.1490(10), c = 11.4620(10)A, alpha = 97.050(10), beta = 90.140(10), gamma = 90.120(10) degrees, V = 541.81(12)A3, Dx = 1.564 g/cm3, and Z = 2. The R value is 0.047 for 1388 observed reflections. The dihedral angle between the phenyl ring and the isobutenyl group is 72.3(2) degrees. There is an intermolecular hyd...

First-order rate constants have been determined for the decarboxylative Claisen rearrangement reactions at 293 K of substituted methyl (E)-3-phenyl-2-propenyl 2-tosylmalonate esters, which show a linear free-energy relationship indicative of the development of positive charge on the benzylic position in the sigmatropic rearrangement transition-state.

Reaction of 3,3,3-trifluoropropyne with 2 -deoxy-5-iodouridine under conditions that have previously been used to prepare 5-alkynyl-2 -deoxyuridine derivatives gave 2 -deoxy-N3-(3,3,3-trifluoro-1-propenyl)uridine. This unexpected alkylation is a result of a Michael-type addition of N3 on the pyrimidine base to the electron deficient trifluoropropyne. © 2003 Elsevier Ltd. All rights reserved. Th...

In the monoclinic polymorph of the title compound, C(13)H(23)NO(5)S, inter-molecular N-H⋯O hydrogen bonds link mol-ecules into one-dimensional chains along [100]. The atoms of the terminal propenyl group are disordered over two sets of sites with refined occupancies of 0.69 (2) and 0.31 (2).

Brassicales species rich in glucosinolates are used for biofumigation, a process based on releasing enzymatically toxic isothiocyanates into the soil. These hydrolysis products are volatile and often reactive compounds. Moreover, glucosinolates can be degraded also without the presence of the hydrolytic enzyme myrosinase which might contribute to bioactive effects. Thus, in the present study th...