A procedure for protiodesilylation of 1-(trimethylsilyl)-1-alkynes that involves the use of catalytic amounts of AgNO3 and does not require the employment of KCN is described. This procedure allows for chemoselective deprotection of 1-(trimethylsilyl)-1-alkynes containing α-(trimethylsilyl)benzyl moieties, tert-butyldiphenylsilyl alkyl ethers or tert-butyldimethylsilyl aryl ether groups. However, it causes complete desilylation of 1-(trimethylsilyl)-1-alkynes characterised by a primary alcoholic group protected as a tert-butyldimethylsilyl ether. Interestingly, compounds that contain this last functional group can also furnish the corresponding alcohols by treatment with a catalytic amount of aqueous HNO3.
Silver(I)-catalysed protiodesylilation of (1-trimethylsilyl)-1-alkynes
CARPITA, ADRIANO;ROSSI, RENZO
2005-01-01
Abstract
A procedure for protiodesilylation of 1-(trimethylsilyl)-1-alkynes that involves the use of catalytic amounts of AgNO3 and does not require the employment of KCN is described. This procedure allows for chemoselective deprotection of 1-(trimethylsilyl)-1-alkynes containing α-(trimethylsilyl)benzyl moieties, tert-butyldiphenylsilyl alkyl ethers or tert-butyldimethylsilyl aryl ether groups. However, it causes complete desilylation of 1-(trimethylsilyl)-1-alkynes characterised by a primary alcoholic group protected as a tert-butyldimethylsilyl ether. Interestingly, compounds that contain this last functional group can also furnish the corresponding alcohols by treatment with a catalytic amount of aqueous HNO3.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
