N-Fused Indolines through Non-Carbonyl-Stabilized Rhodium Carbenoid CH Insertion of N-Aziridinyl Imines
作者:Stuart J. Mahoney、Eric Fillion
DOI:10.1002/chem.201103155
日期:2012.1.2
Under rhodium catalysis, N‐aziridinyl imines provided access to N‐fused indolines through non‐carbonyl‐stabilized rhodium carbenoid CHinsertion. The utility of this methodology for the synthesis of architecturally complex heterocycles was further demonstrated by an expedient total synthesis of (±)‐cryptaustoline (see scheme).
TMEDA‐Catalyzed Regioselective Decarboalkoxy C−N Bond Formation: A Unified Direct Access to Indolo[2,1‐
<i>a</i>
]isoquinoline and Dibenzopyrrocoline Alkaloids
作者:Lalit Yadav、Bharti Rajesh Kumar Shyamlal、Mohit K. Tiwari、Abdul Rahaman T. A、Janmejaya Sen、Sandeep Chaudhary
DOI:10.1002/asia.202200398
日期:2022.8.15
An unprecedented TMEDA-catalyzed, regioselective, decarboethoxy directC−N coupling protocol towards the synthesis of dibenzopyrrocolines 17 a–i and 5,6-dihydroindolo[2,1-a]isoquinoline 15 a–f/18 a–c alkaloids via the identification of N, N, N′, N′-tetramethylethylenediamine (TMEDA) as a homogeneous catalyst is reported.
一种前所未有的TMEDA催化、区域选择性、脱乙氧基直接C - N偶联方案,通过报道了 N, N, N', N'-四甲基乙二胺 ( TMEDA ) 作为均相催化剂的鉴定。
A Facile Route to Indolo[2,1-<i>a</i>]isoquinolines and Dibenzopyrrocoline Alkaloids
Treatment of 1-(2'-bromobenzyl)-3,4-dihydroisoquinolines 2 in the presence of K2CO3 in boiling DMF efficiently provided a variety of alkoxy-substituted indolo[2,1-a]isoquinolines 3. Application of this cyclization to 7-benzyloxyisoquinoline derivatives, followed by further elaboration of the resultant 2-benzyloxy-5,6-dihydroindolo[2,1-a]isoquinolines 16a,b, led to the formal synthesis of dibenzopyrrocoline alkaloids, (+/-)-cryptaustoline (1a) and (+/-)-cryptowoline (1b).
Silicon-mediated Isoquinoine Alkaloid Synthesis: A New Route to the Dibenzopyrrocoline Alkaloid (±)-Cryptaustoline
作者:Seiichi Takano、Shigeki Sstoh、Kunio Ogasawara
DOI:10.3987/r-1987-06-1483
日期:——
YASUDA, SHINGO;HIRASAWA, TAEKO;YOSHIDA, SHUJI;HANAOKA, MIYOJI, CHEM. AND PHARM. BULL., 37,(1989) N, C. 1682-1683