Selenium-stabilized anions. Preparation of .alpha.,.beta.-unsaturated carbonyl compounds using propargyl selenides. Synthesis of (.+-.)-7-hydroxymyoporone
Selenium-stabilized anions. Preparation of .alpha.,.beta.-unsaturated carbonyl compounds using propargyl selenides. Synthesis of (.+-.)-7-hydroxymyoporone
Synthetic transformation of homopropargylic selenides to conjugated diene-substituted alcohols and amines using diisopropoxy(η2-alkyne)titanium intermediates
作者:Kazuki Shintaku、Yoko Nishino、Hajime Maeda、Masahito Segi
DOI:10.1016/j.tet.2013.03.060
日期:2013.5
selenides with the low-valent titanium reagent, derived from Ti(O-i-Pr)4 and 2 equiv of i-PrMgCl, proceeded via titanium–alkyne complexes, followed by the reaction with electrophiles, such as aldehydes and imines to afford allylicalcohols and amines having a phenylseleno group in moderate to high yields with excellent regioselectivity (up to >99:1). Especially, the reaction of the silyl-substituted
homopropargylic硒化物与低价钛试剂的反应,由Ti(O-衍生我-Pr)4和2的当量我-PrMgCl,通过钛系复合炔,随后用亲电子反应,例如醛和进行亚胺以中等至高收率提供具有苯基硒烯基的烯丙醇和胺,具有出色的区域选择性(高达> 99:1)。尤其是,甲硅烷基取代的炔烃与亚胺的反应以几乎完全的区域选择性提供了所需的产物。所得产物用H 2 O 2氧化。通过亚硒酸酯消除以高收率制得共轭二烯取代的醇和胺。另外,在氧化脱硒条件下,产物的异构体比率几乎完全保持。
Synthesis of [3-(trimethylsilyl)prop-2-yn-1-yl] selenides
作者:M. V. Musalov、M. V. Andreev、S. V. Amosova、L. I. Larina、V. A. Potapov
DOI:10.1134/s1070428017100049
日期:2017.10
Efficient and selective methods have been developed for the synthesis of previously unknown organyl [3-(trimethylsilyl)prop-2-yn-1-yl] selenides, organyl prop-2-yn-1-yl selenides, and bis[3-(trimethylsilyl) prop-2-yn-1-yl] selenide by reactions of 3-bromo-1-(trimethylsilyl)prop-1-yne with the corresponding organylselenolates and sodium selenide generated from diorganyl diselenides or elemental selenium