4-bromo-7-methoxy-2,2-dimethyl-2H-thiochromene | 1160309-77-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 硫色烯
• 英文名称: 4-bromo-7-methoxy-2,2-dimethyl-2H-thiochromene
• CAS: 1160309-77-2
• 化学式: C₁₂H₁₃BrOS
• 分子量: 285.205
• InChiKey: CVQHYRFNJUZSEF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.32
• 重原子数：
  15.0
• 可旋转键数：
  1.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  9.23
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  4-bromo-7-methoxy-2,2-dimethyl-2H-thiochromene 在 正丁基锂 、 scandium tris(trifluoromethanesulfonate) 作用下， 以 四氢呋喃 、 正己烷 、 苯 为溶剂， 生成 (+/-)-3,8,9-trimethoxy-6,6-dimethyl-6,6a-dihydroindeno[1,2-c]thiochromene
  参考文献：
  名称：

  Application of Nazarov type electrocyclization to access [6,5,6] and [6,5,5] core embedded new polycycles: an easy entry to tetrahydrofluorene scaffolds related to Taiwaniaquinoids and C-nor-D homosteroids

  摘要：

  在相对温和和催化的纳扎罗夫型电环化条件下，已经实现了一种简单、高效且简洁的方法，用于合成嵌入新多环的四氢氟烯[6,5,6]ABC三环核心，使用2 mol% Sc(OTf)3在无水DCM（氯仿）中于室温反应，获得了高产率。通过合成嵌入稀有异三环[6,5,5]ABC骨架的多样化多环，展示了该反应的普遍性。

  DOI：

  10.1039/c0ob00892c
• 作为产物：
  描述：

  2,3-dihydro-7-methoxy-2,2-dimethyl-4H-1-benzothiopyran-4-one 在 三溴化磷 作用下， 以 苯 为溶剂， 反应 24.0h， 生成 4-bromo-7-methoxy-2,2-dimethyl-2H-thiochromene
  参考文献：
  名称：

  Application of Nazarov type electrocyclization to access [6,5,6] and [6,5,5] core embedded new polycycles: an easy entry to tetrahydrofluorene scaffolds related to Taiwaniaquinoids and C-nor-D homosteroids

  摘要：

  在相对温和和催化的纳扎罗夫型电环化条件下，已经实现了一种简单、高效且简洁的方法，用于合成嵌入新多环的四氢氟烯[6,5,6]ABC三环核心，使用2 mol% Sc(OTf)3在无水DCM（氯仿）中于室温反应，获得了高产率。通过合成嵌入稀有异三环[6,5,5]ABC骨架的多样化多环，展示了该反应的普遍性。

  DOI：

  10.1039/c0ob00892c

文献信息

• Application of Nazarov cyclization to access [6-5-6] and [6-5-5]tricyclic core embedded new heterocycles: an easy entry to structures related to Taiwaniaquinoids
  作者：Ritesh Singh、Maloy Kumar Parai、Gautam Panda

  DOI：10.1039/b901632e

  日期：——

  A concise and general route to synthesize a new class of [6-5-6] tricyclic core embedded polyheterocycles has been accomplished using diastereoselective Nazarov cyclization with an overall yield of 35–40%. Versatility of this synthetic route has also been demonstrated by accessing a variety of [6-5-5] tricyclic core incorporated polycycles. It was observed that the efficiency of cyclization depends

  使用非对映选择性纳扎罗夫环化法合成了一种新型的[6-5-6]三环核嵌入多杂环化合物的简洁而通用的方法，其总收率为35-40％。通过使用各种[6-5-5]三环掺入核心的多环化合物也证明了这种合成途径的多功能性。观察到环化效率取决于极化对反应体系的影响。在筛选用于环化的各种路易斯酸和布朗斯台德酸中，三氟甲磺酸 被发现是最有效的催化剂。
• An unexpected reaction of phosphorous tribromide on chromanone, thiochromanone, 3,4-dihydro-2H-benzo[b]thiepin-5-one, 3,4-dihydro-2H-benzo[b]oxepin-5-one and tetralone derived allylic alcohols: a case study
  作者：Maloy K. Parai、Shagufta、Ajay K. Srivastava、Matthias Kassack、Gautam Panda

  DOI：10.1016/j.tet.2008.07.106

  日期：2008.10

  Treatment of chromanone, thiochromanone, tetralone and benzo[b]thiepinone derived allylic alcohols with phosphorous tribromide furnished unexpected products instead of desired bromo derivatives. Reaction of 7-methoxy-2,2-dimethylchromenyl-aryl-methanols and 7-methoxy-2,2-dimethylthio-chromenyl-aryl-methanols with PBr3 gave saturated carbonyls and exocyclic olefins depending on the substituents at R-4, whereas allylic alcohols without 7-methoxy substituent furnished rearranged products. Several related analogs varying in ring size, heteroatom in the ring and substituents at various positions were synthesized and studied. Reactions of other phosphorous-based reagents like PPh3, PPh3/I-2 and PPh3Br2 on allylic alcohols were also attempted. A case study is presented here. (C) 2008 Elsevier Ltd. All rights reserved.