98204-60-5Relevant academic research and scientific papers
Palladium(0)-catalyzed thioboration of terminal alkynes with 9-(alkylthio)-9-borabicyclo[3.3.1]nonane derivatives: Stereoselective synthesis of vinyl sulfides via the thioboration-cross-coupling sequence
Ishiyama, Tatsuo,Nishijima, Koh-Ichi,Miyaura, Norio,Suzuki, Akira
, p. 7219 - 7225 (2007/10/02)
Theaddition of 9-(alkylthio)-9-borabicyclo[3.3.1]nonanes(9-(RS)-9-BBN) 1 to terminal alkynes was catalyzed by Pd(PPh3)4 (3 mol %) to produce 9-[(Z)-2-(alkylthio)-1-alkenyl]-9-BBN derivatives 2 in high yields. The reactions were highly regio- and stereoselective, and their conditions were sufficiently mild that a variety of functionalized alkenylboranes 2 with defined stereochemistry were readily synthesized. The boranes 2 exhibited exceptionally high reactivity on protonolysis with methanol to produce the Markovnikov adducts of thiols to 1-alkynes, 2-(alkylthio)-1-alkenes 3. The synthetic utility of the present reaction was demonstrated by the regio- and stereoselective one-pot synthesis of alkenyl sulfides 7 via the palladium-catalyzed thioboration-cross-coupling sequence.
A STEREOSELECTIVE ROUTE TO ALKENYL SULFIDES THROUGH THE PALLADIUM-CATALYZED CROSS-COUPLING REACTION OF 9-ALKYL-9-BBN WITH 1-BROMO-1-PHENYLTHIOETHENE OR (E)- AND (Z)-2-BROMO-1-PHENYLTHIO-1-ALKENES
Hoshino, Yukio,Ishiyama, Tatsuo,Miyaura, Norio,Suzuki, Akira
, p. 3983 - 3986 (2007/10/02)
The reaction of 9-alkyl-9-BBNs with 1-bromo-1-phenylthioethene or (E)- and (Z)-2-bromo-1-phenylthio-1-alkenes takes place readily in the presence of Pd(PPh3)4 and sodium hydroxide to afford stereodefined vinylic sulfides in exellent yields.
BENZYNE-INDUCED FRAGMENTATION OF 1,3-OXATHIOLANES. A NOVEL METHOD FOR DEPROTECTION OF CARBONYL GROUPS, PREPARATION OF PHENYL VINYL SULFIDES, AND 1,2-CARBONYL TRANSPOSITION
Nakayama, Juzo,Sugiura, Hidetoshi,Shiotsuki, Atsuko,Hoshino, Masamatsu
, p. 2195 - 2198 (2007/10/02)
A variety of 1,3-oxathiolanes undergo a benzyne-induced fragmentation leading to phenyl vinyl sulfides and carbonyl compounds.The reaction developed here provides a novel method for deprotection of carbonyl compounds from 1,3-oxathiolanes, preparation of phenyl vinyl sulfides, and 1,2-carbonyl transposition.
