Allenyl thioester

Allenyl thioesters can also react with imidazole derivative 511 leading to the formation of the thioesters of /8,y-unsaturated enoic acids 512 [232]. 

Furthermore, highly stereoselective dithiocarbonylation of propargylic mesylates with thiols and carbon monoxide is attained by the use of tetrakis(triphenyl-phosphine)palladium(O) as the catalyst. This dithiocarbonylation is believed to proceed via allenylpalladium and allenyl thioesters, and the high stereoselectivity may be rationalized by a mechanism where nucleophilic attack of a Pd(0) species on the... 

Allenyl bromide accepts the nucleophilic attack of amines or potassium thio-acetate leading to propargylic amines or thioesters via the alkenylidenecarbene 132 or zwitterion intermediate 133 [66],... 

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