An enantioselective Mannich reaction of N-Boc aminosulfones with 3-methylbenzofuran-2 (3H)-ones catalyzed by a quinine-derived bifunctional phase transfer catalyst was developed, by which a series of chiral benzofuranones bearing adjacent quaternary and tertiary carbon centers were obtained in high yields (up to 96%) with good diastereoselectivities (up to >99:1) and enantioselectivities (up to 98%)
开发了由奎宁衍生的双功能相转移催化剂催化的 N -Boc 氨基砜与 3-甲基苯并呋喃-2 (3H)-酮的对映选择性曼尼希反应,通过该反应获得了一系列带有相邻季碳和叔碳中心的手性苯并呋喃酮高产率(高达 96%),具有良好的非对映选择性(高达 >99:1)和对映选择性(高达 98%)。
PICCOLO, O.;FILIPPINI, L.;TINUCCI, L.;VALOTI, E.;CITTERIO, A., J. CHEM. RES. SYNOP., 1985, N 8, 258-259
作者:PICCOLO, O.、FILIPPINI, L.、TINUCCI, L.、VALOTI, E.、CITTERIO, A.
DOI:——
日期:——
UTILISATION DE DIHYDROBENZOFURANONES A TITRE D'INGREDIENTS PARFUMANTS
申请人:FIRMENICH SA
公开号:EP0707575A1
公开(公告)日:1996-04-24
US5679634A
申请人:——
公开号:US5679634A
公开(公告)日:1997-10-21
[EN] USE OF DIHYDROBENZOFURANONES AS SCENTING INGREDIENTS<br/>[FR] UTILISATION DE DIHYDROBENZOFURANONES A TITRE D'INGREDIENTS PARFUMANTS
申请人:FIRMENICH S.A.
公开号:WO1995030667A1
公开(公告)日:1995-11-16
(EN) The use of (3H)-benzo[b]furan-2-ones, substituted particularly by alkyl groups, for preparing scenting compositions and scented articles to which such compounds impart lactone, coumarin, fruity or musky notes, is disclosed.(FR) On décrit l'utilisation de (3H)-benzo[b]furan-2-ones substituées, notamment par des groupes alkyles, pour la préparation de compositions parfumantes et articles parfumés, auxquels ces composés impartissent des notes odorantes de type lactonique, coumariné et fruité, ou encore musqué.