(3S)-(+)-3-(1-Methylindol-3-yl)-3-phenylpropionaldehyde
(3S)-(+)-3-(1-Methylindol-3-yl)-3-phenylpropionaldehyde (CAS 405873-09-8), a chiral aldehyde with the molecular formula C18H17NO and a molecular weight of 263.33 g/mol, is a valuable building block in organic synthesis. Its asymmetric structure and the presence of an indole moiety make it suitable for constructing complex molecules. It is particularly useful in asymmetric synthesis and the development of novel chemical entities.
- IUPAC
- (3S)-(+)-3-(1-Methylindol-3-yl)-3-phenylpropanaldehyde

Chiral Building Block
This compound serves as a chiral building block in asymmetric synthesis, enabling the stereoselective construction of complex organic molecules. Its enantiopure nature is crucial for applications requiring specific stereochemistry.
Indole Derivatives Synthesis
The presence of the 1-methylindol-3-yl group makes it a key intermediate for synthesizing a variety of indole-containing compounds, which are prevalent in pharmaceuticals and natural products.
Organic Synthesis Intermediate
As an aldehyde, it readily participates in various organic transformations, including nucleophilic additions, reductions, and oxidations, facilitating the synthesis of diverse chemical structures.
| Molecular weight | 263.33 |
|---|---|
| Empirical formula | C18H17NO |
| Assay | 97% |
| Optical activity | [α]20/D +41°, c = 1% in chloroform |
| Optical purity | ee: 99% (HPLC) |
| Melting point | 63-67 °C(lit.) |


Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H318Causes serious eye damage
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-37/38-41-42/43 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is (3S)-(+)-3-(1-Methylindol-3-yl)-3-phenylpropionaldehyde used for?
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It is primarily used as a chiral building block and intermediate in organic synthesis, particularly for the construction of complex molecules and indole derivatives via asymmetric synthesis.
What are the CAS number and formula for this compound?
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The CAS number is 405873-09-8, and the empirical formula is C18H17NO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with an assay of 97% and an optical purity of ee: 99% (HPLC). TSS does not represent this product as USP, BP, or EP grade.
What are the safety considerations for handling this chemical?
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This compound is classified with GHS05 and GHS07 symbols, and the signal word is Danger. It carries hazard statements H302, H315, H317, H318, and H335, indicating it is harmful if swallowed, causes skin irritation, may cause an allergic skin reaction, causes serious eye damage, and may cause respiratory irritation. Appropriate personal protective equipment, including a dust mask (type N95 or equivalent), eyeshields, face shield, and gloves, must be used.
How is this chemical shipped and exported?
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As a global supplier and exporter, Tech Serve Solutions adheres to all international shipping regulations for chemical products, ensuring safe and compliant delivery worldwide.
How can I request a sample or quote for this product?
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Please contact our sales team or use the online inquiry form on our website to request a sample or a detailed quotation for (3S)-(+)-3-(1-Methylindol-3-yl)-3-phenylpropionaldehyde.
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