Explanipedia

New heterocyclic natural products Open

Keiichiro Fukumoto · 2010

Total synthesis of heterocyclic natural products Open

Keiichiro Fukumoto · 2010

Publications of Keiichiro Fukumoto Open

Keiichiro Fukumoto · 2009

Bibliographical Data Open

Keiichiro Fukumoto · 2009

薬学会賞受賞井原正隆氏の業績(紹介) Open

Keiichiro Fukumoto · 2005

Editor's Note Open

Keiichiro Fukumoto · 2003

Thirty years have passed since we first published Heterocycles.It seems like only yesterday.This special issue is to commemorate the journal's great achievements.It was thirty years ago that Professor Tetsuji Kametani, the founder of Heter…

A Practical Synthesis of the Key Intermediate for Theopederins—An Enantioselective Total Synthesis of (+)-Methyl Pederate Open

Masahiro Toyota, Youichi Nishikawa, Keiichiro Fukumoto · 1998

Diastereofacial Selectivity of Radical Cyclization Using Chiral a,b-Unsaturated Ester and Amide: Investigation of a New Chiral Synthon Synthesis Open

Masataka Ihara, Akira Katsumata, Takehiko Iwaki, Keiichiro Fukumoto · 1997

Synthesis of Benzo[a]quinolizines by the Intramolecular Double Michael Reaction under Three Different Conditions Open

Keiichiro Fukumoto, Masataka Ihara, Masami Yamada, Yohei Ishida, Yuji Tokunaga · 1997

Benw[a]quinolizines (4A-C) and (5A-C) were synthesized by the intramolecular double Michael reaction of amide esters (3A-C).canied out using three reagent systems; TBDMSOTf-EQN, TMSI-(TMShNH, and Bu2BOTf-(TMS)2NH.Benzo[a]quinolizine is a c…

INOC Reaction in Alkaloid Synthesis — Stereocontrolled Formal Total Synthesis of (+)-Pumiliotoxin C Open

Masahiro Toyota, Takanobu Asoh, Keiichiro Fukumoto · 1997

The Synthesis of 1b-Fluorocarbapenem Derivative Open

Keiichiro Fukumoto, Masataka Ihara, Ken Satoh, Yohhei Ishida, Nobuaki Taniguchi , et al. · 1996

The synthesis of IP-fluorocarbapenem derivative ( 16) was carried out starting with the 4-acetoxyazetidin-%one (3) through the carbapenem formation utilizing the Sankyo's procedure.Since the presence of a 1P-methyl substituent such as 1 ha…

Silver(I) Salt Promoted Generation of Nitrile Oxides from Hydroxymoyl Chlorides Open

Keiichiro Fukumoto, Yuji Tokunaga, Masataka Ihara · 1996

Developments of Highly Stereoselective Domino Reactions and Application to Medicinal Chemistry Open

Keiichiro Fukumoto · 1996

Simple and highly effective methods for the synthesis of polycyclic ring systems via two types of intramolecular domino reactions are developed and presented. The first example is an intramolecular double Michael reaction, whose scope-limi…

Unexpected Stereoselectivity of Intramolecular 1,3-Dipolar Cycloaddition Caused by the Presence of Fluorine Atom Open

Keiichiro Fukumoto, Masataka Ihara, Tatsuo Kawabuchi, Yuji Tokunaga · 1995

INOC Reaction in Gibberellin Synthesis - A Practical Synthesis of the Key Intermediate for Gibberellin A12 Open

Keiichiro Fukumoto, Masahiro Toyota, Toshihiro Wada · 1995

INOC Reaction in Alkaloid Synthesis --- Preparation of Potential Intermediate for the Synthesis of (-)-Reserpine --- Open

Keiichiro Fukumoto, Masahiro Toyota, Masaki Matsuura · 1995

Indirect Electroreductive Cyclization for Syntheses of Key Intermediates of Several Indole and Ipecac Alkaloids. Open

Masataka Ihara, Fumihito Setsu, Yuji Tokunaga, Keiichiro Fukumoto, Yoshitomo Kashiwagi , et al. · 1995

Indirect electroreductive cyclization of η-bromo-α, β-unsaturated esters 1-6 using Co(III) or Ni(II)complex as an electron-transfer catalyst provided the six membered compounds 7-12, which are useful synthetic intermediates of several indo…

Silymethyl Radical Cyclization in Theopederins Synthesis --- A New Access to Pederic Acid Open

Keiichiro Fukumoto, Masahiro Toyota, Noriko Yamamoto, Youichi Nishikawa · 1995

Effective Ring Formations and Natural Product Syntheses Open

Keiichiro Fukumoto · 1994

Simple and effective synthetic methods of polycylic ring systems in intramolecular reactions are presented. The first example is Diels-Alder reaction, which has been applied to total synthesis of steroids and terpenes. The intramolecular d…

A Novel Approach to Optically Active Des-A C-13 Ethyl Steroids. Open

Hideo Nemoto, Atsushi Satoh, H Fukui, Shiho FUJIMORI, Keiichiro Fukumoto · 1994

Optically active des-A C-13 ethyl steroids 17∼20 have been synthesized by thermolysis of the optically active alkenic benzocyclobutene 14 as a key process.

An Efficient Synthesis of 1,2,3,4-Tetrasubsttituted Pyrroles via Intramolecular Azomethine Ylide [3+2] Dipolar Cycloaddition Open

Keiichiro Fukumoto, Masahiro Toyota, Youichi Nishikawa · 1994

An Efficient Route to Chiral Benzooxabicyclo[3.2.1]octane Ring System-- The First Enantiocontrolled Total Synthesis of (-)-Filiformin Open

Keiichiro Fukumoto, Hideo Nemoto, Hideki Hakamata, Masatoshi Nagamochi · 1994

Lewis Acid Promoted Tandem [4+2] Cycloaddition-Rearrangement Process — A Simple and Efficient Synthesis of Highly Functionalized Oxabicyclo[3.3.1]nonanes Open

Keiichiro Fukumoto, Masahiro Toyota, Yoshihiro Wada, Youichi Nishikawa, Toshihiro Wada · 1994

Catalytic Lewis acid promoted tandem [4 + 2]cycloaddition rearrangement processes of the trienic esters (4), (8) and (9) are reported. The novel tandem reactions proceed under thermal (110°C, aluminum catalyst) conditions and afford the hi…

A Total Synthesis of (±)-Tacamonine (Pseudovincamone I) through Radical Cyclization Open

Keiichiro Fukumoto, Masataka Ihara, Fumihito Setsu, Miyuki Shoda, Nobuaki Taniguchi · 1994

The radical cyclization of the bromo ester (11), prepared from 2-hydroxymethylbutan-1-ol (7), giving the diastereoisomeric mixture of lactones (12) was examined under various conditions. Treatment of the bromo ester (17), derived from 7, w…

Aspects of the Intramolecular Diels-Alder Reactions of Some 1,3,8-Trienic Esters Open

Keiichiro Fukumoto, Masahiro Toyota, Yoshihiro Wada · 1993

J a p a n ---The intramolecular cycloadditions of a number of 1.3.8trienescontaining monoester or diester function were examined.The

Conversion of the Synthetic Precursor for Ipecac and Corynanthe Alkaloids into Synthetic Intermediates of Quinine Alkaloids and (±)-Dihydroantirhine Open

Keiichiro Fukumoto, Nobuaki Taniguchi, Masataka Ihara · 1992

i t u t e d t e t r a h y d r opyran derivatives (1) was transformed to the cis-substituted lactone (6), which was convcrted into the piperidine (3). the synthetic intermediate o f dihydrocinchonine ( 5 a ) and dihydrocinchonidine ( 5 b ) …

An Enantioselective Synthesis of (R)- and (S)-4,5-Dimethyl-4-hexanolides —— Key Intermediates for 2,3-Dihydro-2-isopropyl-2,5-dimethylfuran, a Sex Specific Compounds in Females of the Beetle Hylecoetus dermestoides L. Open

Keiichiro Fukumoto, Hideo Nemoto, Hiroki Ishibashi · 1992

All new substances exhibited spectroscopic data [

Novel One Step Transformation of Carbomates into Amides Open

Keiichiro Fukumoto, Masataka Ihara, Akihito Hirabayashi, Nobuaki Tanigichim · 1992

A b s t r m --A novel method for the one step conversion of carbamates into amides was developed by the action of acyl chlorides and sodium iodide.In the course of total synthesis of alisine ( 3 ) , ' the key synthetic intermediate (2) was…

An Asymmetric Synthesis of a Quaternary Chiral Building Block from Ethylmalonic Acid: A Preparation of Key Synthetic Intermediates of Hunteria- and Aspidosperma-type Indole Alkaloids Open

Keiichiro Fukumoto, Masataka Ihara, Ken Yasui, Nobuaki Takayanagi · 1990

The ma)or product, obtained by allylation of the 1-1phenylmenthyl half ester ( 4 ) of ethylmalonic acid, was converted into two lactones (111 and ( 16), the key intermediates for indole alkaloids of H u n t e r i aand Aspidosperma-type.A n…

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