Synthesis of butenolides as seed germination stimulants

✍ Scribed by Kingmo Sun; Yuzhong Chen; Ty Wagerle; David Linnstaedt; Martin Currie; Preston Chmura; Ying Song; Ming Xu

• Publisher: Elsevier Science
• Year: 2008
• Tongue: French
• Weight: 111 KB
• Volume: 49
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/j.tetlet.2008.03.024

✦ Synopsis

Syntheses of a series of novel butenolides as seed germination stimulants are described. The key steps include the cyclization reaction of enamine 4 to form a pyran ring, the efficient halogenating reaction and the selective lithiation reaction of butenolides.