54873-11-9Relevant articles and documents
Activation of prop-2-yn-1-ols by metal carbonyls: Synthesis of (alkoxyalkenylcarbene)- and (aminoalkenylcarbene)chromium and -tungsten complexes
Cosset, Christophe,Del Rio, Ignacio,Le Bozec, Hubert
, p. 1938 - 1944 (1995)
Fischer type methoxyalkenylcarbene complexes (CO)5M=C(OMe)(CH=CRR′) have been prepared in one step by photolysis of M(CO)6 [M = Cr, W] in tetrahydrofuran-methanol, in the presence of prop-2-yn-1-ol derivatives HC≡CC(OH)(R)(R′) [R, R′ = Me; R = H, R′ = Me, Ph, C6H4-p-NMe2]. Photolysis of a tetrahydrofuran-methanol solution of M(CO)6 with HC≡CC(OH)(H){(CH=CH)nCH=CRR′} [n = 0 R, R′ = Me; R = H, R′ = H, Me, Ph, C6H4-p-NMe2, C5H11; n = 1 R = H, R′ = Me] provides the new dienyl- and trienylcarbene complexes (CO)5W=C(OMe)(CH=CHCH=CRR′) and (CO)5M=C(OMe)(CH=CHCH=CHCH=CHMe) in 30-70% yields. Alkoxyalkenylcarbene complexes (CO)5M=C(OCH2Z)(CH=CRR′) are prepared analogously by using other primary alcohols ZCH2OH [Z = CH2CH(Me)(Et), CH2-CH2C≡CMe, CH2CH2CH=CH2, CH2CH2C(Me)=CH2. [(Alkenyloxy)alkenylcarbene]tungsten complexes undergo smooth thermal intramolecular cyclopropanation reactions leading to 1-alkenyl-2-oxabicyclo[3.1.0]hexane compounds. Finally, a series of aminodienylcarbene complexes (CO)5W=C(NHR′)(CH=CHCH=CHR) [R = Ph, C5H11; R′ = CHMe2, CMe3, CH2-CH=CH2, CH2CHMe2] have been synthesized by aminolysis of the corresponding methoxydienyl carbenes.
Reaction of chromium carbene complexes with imines. Synthesis of β-lactams
Hegedus,McGuire,Schultze,et al.
, p. 2680 - 2687 (2007/10/02)
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