Mercuric acetate-mediated annulation of homopropargylic alcohols having thioether substituent. A general route for the synthesis of tetrasubstituted furans from propargylic dithioacetals
摘要:
Treatment of an alkyl-substituted propargylic dithioacetal with (BuLi)-Bu-n followed by an aldehyde furnishes thio-substituted homopropargylic alcohol 7 which undergoes annulation in the presence of two equivalents of mercury acetate to give the corresponding mercurio-substituted furan 12. Reaction of 12 with iodine gives iodofuran in moderate to good yield. (C) 2009 Elsevier Ltd. All rights reserved.
Elimination of β-Thioalkoxy Alcohols under Mitsunobu Conditions. A New Synthesis of Conjugated Enynes from Propargylic Dithioacetals
作者:Chih-Wei Chen、Tien-Yau Luh
DOI:10.1021/jo8013885
日期:2008.11.7
Treatment of propargylic dithiolanes 1 with (n)BuLi followed by a carbonyl electrophile yields the corresponding homopropargylic alcohol 3. Upon treatment with 2 equiv of PPh3 and DIAD, elimination of SR and OH moieties from 3 affords the corresponding olefins 4 in moderate to good yield. The reaction can be considered an alternative of McMurry coupling of two different carbonyl equivalents.
Mercuric acetate-mediated annulation of homopropargylic alcohols having thioether substituent. A general route for the synthesis of tetrasubstituted furans from propargylic dithioacetals
作者:Chih-Wei Chen、Tien-Yau Luh
DOI:10.1016/j.tetlet.2009.02.043
日期:2009.7
Treatment of an alkyl-substituted propargylic dithioacetal with (BuLi)-Bu-n followed by an aldehyde furnishes thio-substituted homopropargylic alcohol 7 which undergoes annulation in the presence of two equivalents of mercury acetate to give the corresponding mercurio-substituted furan 12. Reaction of 12 with iodine gives iodofuran in moderate to good yield. (C) 2009 Elsevier Ltd. All rights reserved.