A rapid access to indolo[2,1-a]pyrrolo[4′,3′:4,5]pyrano[5,6-c]coumarin/[6,5-c]chromone derivatives by domino Knoevenagal intramolecular hetero Diels–Alder reactions
indole-2-carbaldehyde containing an internal dienophile with coumarins, followed by domino intramolecular hetero Diels–Alderreaction, provides polycyclic heterocycles. Different approaches for stereo- and chemoselective synthesis of indolo[2,1-a]pyrrolo[4′,3′:4,5]pyrano[5,6-c]coumarin and indolo[2,1-a]pyrrolo[4′,3′:4,5]pyrano[6,5-c]chromone derivatives are described.
含有内部亲双烯体的吲哚-2-甲醛与香豆素的Knoevenagal缩合反应,然后发生多米诺骨牌分子内杂Diels-Alder反应,形成多环杂环。吲哚[2,1- a ]吡咯[4',3':4,5]吡喃[5,6- c ]香豆素和吲哚[2,1- a ]吡咯[4]的立体和化学选择性合成的不同方法描述了′,3′:4,5]吡喃并[6,5- c ]色酮衍生物。
Cyclopropapyrrolo[1,2-a]indoles
作者:Graham B. Jones、Christopher J. Moody
DOI:10.1039/c39880000166
日期:——
Decomposition of the tosylhydrazones (3), prepared from indole-2-carbaldehyde in two steps, gives the cyclopropapyrrolo[1,2-a]indoles (4), novel analogues of the mitomycin antitumour antibiotics, by an intramolecular cycloaddition reaction.
由吲哚-2-甲醛分两步制备的甲苯磺酰hydr(3)可以通过分子内环加成反应得到丝裂霉素抗肿瘤抗生素的新类似物-环丙吡咯并[1,2- a ]吲哚(4)。
Cyclizations of Aryl Enynes Containing Propargyl Alcohol and Diallylamine Groups to Yield Indolecarbaldehydes Induced by Ruthenium Complexes
作者:Yi‐Jhen Feng、Fu‐Yuan Tsai、Shou‐Ling Huang、Yi‐Hong Liu、Ying‐Chih Lin
DOI:10.1002/ejic.201402678
日期:2014.11
The reactions of RuCl(PPh3)2Cp ([Ru]Cl, Cp = cyclopentadienyl) with aryl enynes 1a–1c containing propargyl alcohol and diallylamine groups on the aryl ring give the carbene complexes 2a–2c, each of which contains an indole group. With an additional methylene group, the aryl enyne 1d reacts with [Ru]Cl to afford the dihydroisoquinoline complex 3d. For 1a–1d, the C–N bond-forming process occurs when
Solid-Supported Microwave-Accelerated Intramolecular Knoevenagel Hetero-Diels-Alder Reactions: A Protocol for the Synthesis of Indolo[2,1-<i>a</i>]pyrrolo[4′,3′:4,5]pyran Ring Systems
A novel and mild method was established to synthesize pyrroloindole derivatives. This method entails an ethylenediammonium diacetate (EDDA)-promoted Knoevenagel condensation of various diones with appropriately substituted aldehydes to yield the arylidene intermediate, which was smoothly converted to the final products by intramolecular Diels-Alder reaction in a tandem manner. This process describes