"Kozo Toyota,Keiko Horikawa,Rader S. Jensen,kohei Omori,Subaru Kawasaki,Shigekazu Ito,Masaaki Yoshifuji,Morita","An Improved Preparative Method for 1,2-Diaryl-3,4-diphosphinidenecyclobutenes and Its Application to the Studies of 1,2-Bis(arylthienyl)-3,4-diphosphinidenecyclobutenes",,"Bull. Chem. soc. Jpn",,"vol. 80",,"p. 1580",2007,Apr.
"Shigekazu Ito,Kozo Toyota,Masaaki Yoshifuji","Reactions of a Sterically Protected 2,3-Dichloro-1,4-diphospha-1,3-butadiene with Some Alkyl and Hydrido Lithium Reagents",,"Heteroat. Chem.",,"Vol. 11","No. 3","pp. 171-176",2000,Aug.
"Shigekazu Ito,Kozo Toyota,Masaaki Yoshifuji","Reactions of Sterically Protected 1-Halo- and 1-Pseudohalo-2-phosphaethenyllithiums","ICPC-14","Phosphorus, Sulfur Silicon Relat. Elem.",,"Vol. 147",,"p. 1269",1999,Aug.
"Shigekazu Ito,Kozo Toyota,Masaaki Yoshifuji","Preparation and Structure of 2,3-Dichloro-1,4-bis(2,4,6-tri-t-butylphenyl)-1,4-diphospha-1,3-butadiene",,"Chem. Lett.",,,"no. 8","pp. 747?748",1998,Aug.
"Shigekazu Ito,Kozo Toyota,Masaaki Yoshifuji","A Convenient Synthesis of a Sterically Protected 1,4-Diphosphabutatriene and Its Pentacarbonyltungsten Complexes",,"J. Organomet. Chem.",,"Vol. 553",,"  135?140",1998,Mar.
"Shigekazu Ito,Kozo Toyota,Masaaki Yoshifuji","Formation of 6,8-Di-t-butyl-3,4-dihydro-4,4-dimethyl-1-phosphanaphthalene by the Reaction of 2,2-Dibromo-1-(2,4,6-tri-t-butylphenyl)-1-phosphaethene with Butyllithium",,"Chem. Commun.",,,"no. 17","pp. 1637-1638",1997,Sept.
"Masaaki Yoshifuji,Shigekazu Ito,Kozo Toyota,Masafumi Yasunami","Reaction of 2,4-Di-t-butyl-6-methylphenylphosphonous Dichloride with Chloroform in the Presence of Lithium Diisopropylamide",,"Heteroat. Chem.",,"Vol. 7",,"pp. 23-27",1996,Feb.
"Masaaki Yoshifuji,Shigekazu Ito,Kozo Toyota,Masafumi Yasunami","Preparation of Some Multi-functionalized Methylenephosphines by Reactions of Chloro[(2,4,6-tri-t-butylphenyl)phosphinidene]methyllithium with Carbonyl Compounds,�h Bul",,"Bull. Chem. Soc. Jpn.",,"Vol. 68","No. 4","pp. 1206-1212",1995,Apr.