Methods for indole alkaloid synthesis. A specific procedure for introducing the 6,7 double bond into Aspidosperma-type alkaloids via thiolactam dehydrogenation
作者:Philip. Magnus、Paul A. Pappalardo
DOI:10.1021/ja00262a005
日期:1986.1
Reaction of the indole (I) with the amines (II) gives the imines (III), which are treated with the mixed anhydride (IV) to afford the tetracyclic lactam (V).
Mild Method for the Conversion of Amides to Thioamides
作者:André B. Charette、Michel Grenon
DOI:10.1021/jo0344485
日期:2003.7.1
Aqueous ammonium sulfide was found to be an ideal substitute for hydrogen sulfide for the thiolysis of activated amides. High yields of the corresponding thioamides were obtained for a broad range of substrates, using two different procedures that are both operationally simple and inexpensive, as well as amenable to large-scale preparation. Preliminary results indicate that aqueous ammonium sulfide
Expeditious Microwave-Assisted Thionation with the System PSCl<sub>3</sub>/H<sub>2</sub>O/Et<sub>3</sub>N under Solvent-Free Condition
作者:Uma Pathak、Lokesh Kumar Pandey、Rekha Tank
DOI:10.1021/jo7022069
日期:2008.4.1
efficient synthesis of a variety of thiocarbonyl compounds such as thioamides, thiolactams, thioketones, thioxanthones, and thioacridone can be achieved through this simple and convenient method under solventless condition with microwave irradiation.
一种新的硫化协议羰基化合物,与系统PSCl 3 / H 2 O /的Et 3 N有被发现。通过这种简单方便的方法,在无溶剂条件下用微波辐照,可以实现各种硫代羰基化合物(如硫代酰胺,硫代内酰胺,硫代酮,噻吨酮和硫代rid啶酮)的清洁,快速,高效合成。
Dithio- und Thionester, 54. Mitt.: Versuche zur Darstellung von α-Aminodithiosäureestern mit der Bislactimether-Methode
作者:Klaus Hartke、Andreas Brutsche
DOI:10.1002/ardp.19933260202
日期:——
5‐Piperazindithion (8) und nicht Glycindithiomethylester (6). Die durch Alkylieren von 5 erhaltenen Iminiumsalze 9 werden von H2S in die 1,4‐Dialkyl‐2,5‐piperazindithione 10 übergeführt. 5 bildet mit Chlorameisensäuremethylester 2,5‐Bis(methylthio)‐pyrazin (11) undmit Acetanhydrid das 1,4‐Dihydropyrazin 12. Die Sulfhydrolyse der6‐ und 7‐Ring‐Iminiumsalze 14 führt zu den Thiolactamen 15.
A Versatile Synthesis of (±)-Deoxyfebrifugine, an Antimalarial Alkaloid Analogue, and Related Compounds
作者:Joseph Michael、Charles de Koning、Daniel Pienaar
DOI:10.1055/s-2006-926233
日期:——
The title compound was prepared by a simple route involving Eschenmoser sulfide contraction between 3-(3-bromo-2-oxopropyl)quinazolin-4(3H)-one (11) and piperidine-2-thione (13) followed by chemoselective catalytic hydrogenation. This short but flexible procedure also permitted access to N-alkyl analogues, and to analogues in which the piperidine ring was replaced by other saturated nitrogen-containing