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3-Bromo-2,3-dihydro-2-(2-propenyl)-4H-1-benzopyran-4-one | 130681-23-1

中文名称
——
中文别名
——
英文名称
3-Bromo-2,3-dihydro-2-(2-propenyl)-4H-1-benzopyran-4-one
英文别名
2-allyl-3-bromo-2,3-dihydrobenzopyrone;3-Bromo-2-prop-2-enyl-2,3-dihydrochromen-4-one
3-Bromo-2,3-dihydro-2-(2-propenyl)-4H-1-benzopyran-4-one化学式
CAS
130681-23-1
化学式
C12H11BrO2
mdl
——
分子量
267.122
InChiKey
YHXNKVJQMKVFMR-UHFFFAOYSA-N
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

计算性质

  • 辛醇/水分配系数(LogP):
    3.4
  • 重原子数:
    15
  • 可旋转键数:
    2
  • 环数:
    2.0
  • sp3杂化的碳原子比例:
    0.25
  • 拓扑面积:
    26.3
  • 氢给体数:
    0
  • 氢受体数:
    2

反应信息

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文献信息

  • Tandem reactions in 4-siloxy-1-benzopyrylium salts: introduction of substituents and cyclohexene and cyclopentane annulation in chromones
    作者:Yong Gyun Lee、Kenji Ishimaru、Hideharu Iwasaki、Katsuo Ohkata、Kinya Akiba
    DOI:10.1021/jo00006a018
    日期:1991.3
    Reactions of 4-[(tert-butyldimethylsilyl)oxy]-1-benzopyrylium triflates (2a-c) with silyl enol ethers (3a-d) or allyl organometallic reagents (5a-c) afforded the corresponding 2-substituted 4-siloxy-2H-1-benzopyrans (4a-d and 6a-d) along with 2,3-dihydrobenzopyrone derivatives (7a-c). An unexpected cyclopentane annulation to give 8a,b was observed in the reaction of 2a,b with 3-(trimethylsilyl)-1-butene (5d). Treatment of the products (4a and 6a) with electrophiles (iminium salt, NBS, and NCS) converted them into the corresponding 2,3-disubstituted 2,3-dihydrobenzopyrone derivatives (9a-c). Reaction of benzopyrylium salts (2a,b) with alpha,beta-unsaturated ketones (10a-g) in the presence of tert-butyldimethylsilyl triflate and 2,6-lutidine gave cyclohexene annulation products (xanthone derivatives, 11a-j) in moderate to high yield. The reaction mechanisms are explained in terms of stereoelectronic and 1,3-allylic strain effects together with steric hindrance during the reaction.
  • OHKATA, KATSUO;ISHIMARU, KENJI;LEE, YONG-GYUN;AKIBA, KIN-YA, CHEM. LETT.,(1990) N, C. 1725-1728
    作者:OHKATA, KATSUO、ISHIMARU, KENJI、LEE, YONG-GYUN、AKIBA, KIN-YA
    DOI:——
    日期:——
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