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2-(TRIBUTYLSTANNYL)-5,6-DIHYDRO-[1,4]-DIOXIN synthesis

1synthesis methods
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Yield:131470-66-1 94%

Reaction Conditions:

Stage #1: 1,4-dioxenewith tert.-butyl lithium in diethyl ether;pentane at -78 - -40; for 0.5 h;
Stage #2: tributyltin chloride in diethyl ether;pentane at 10; for 1 h;

References:

Kravina, Alberto G.;Carreira, Erick M. [Angewandte Chemie - International Edition,2018,vol. 57,# 40,p. 13159 - 13162][Angew. Chem.,2018,vol. 130,# 40,p. 13343 - 13346,4] Location in patent:supporting information