Ene reactions of 2-phosphonoacrylates
Ene reactions of 2-phosphonoacrylates
复制标题
2-膦酰基丙烯酸酯的烯反应
DOI:
10.1002/chin.198411270
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发表时间:
1983
期刊:
影响因子:
--
通讯作者:
G. Phillips
中科院分区:
文献类型:
--
作者:
B. Snider;G. Phillips
Trimethyl 2-phosphonoacrylate (la) undergoes EtAlCl2-catalyzed ene reactions in high yield at 0 C with most classes of alkenes. The products are useful reagents for the phosphonate modification of the Wittig reaction. EtAlCl2-catalyzed ene reaction of lawith 6-methyl-5-hepten-2-one (18) at-78 C gives 19, which undergoes an intramolecular Wittig reaction to give 21. Ethyl-methylene-l-cyclohexenebutanoate (16) undergoes a Lewis acid initiated cyclization to give the cyclopropane 30 and octalins 31 and 32.